Section 1 : Algebra Introduction

Lecture 1 Beginning of Algebra 0:51
Lecture 2 Where did the word 'Algebra' come from 2:16
Lecture 3 What is 'Algebra' 4:23
Lecture 4 'Arithmetic' vs 'Algebra' 4:38
Lecture 5 Who is an 'Algebraist' 0:55
Lecture 6 Indian name for 'Algebra' 1:59
Lecture 7 Usages of Algebra 3:40

Section 2 : Algebra Constants and Variables

Lecture 8 Introduction 0:27
Lecture 9 Two types of numbers in Algebra 1:0
Lecture 10 What is a 'Constant' 1:59
Lecture 11 What is a 'Variable' 4:12
Lecture 12 What is a 'Literal' 1:19
Lecture 13 'Constant' vs 'Variable' 2:34
Lecture 14 Constants with 'unknown' values 3:41
Lecture 15 Fundamental operations on variables 2:17
Lecture 16 Why can we perform operations on variables 5:14
Lecture 17 Shorter way to write product of variables 10:51
Lecture 18 Repeated multiplication (or Exponentiation) of variables 8:5
Lecture 19 A variable to the power zero (0) 2:17
Lecture 20 Repeated addition (or Multiplication) of variables 4:36
Lecture 21 Properties of operations on variables 7:2

Section 3 : Algebra Algebraic Expressions

Lecture 22 Algebraic expression - Introduction 0:23
Lecture 23 What is an 'Algebraic expression' 7:52
Lecture 24 'Arithmetic expression' vs Algebraic expression' 3:18
Lecture 25 What are 'terms' 7:9
Lecture 26 How to identify 'terms' in an algebraic expression 2:52
Lecture 27 'Constant term' in an algebraic expression 3:55
Lecture 28 'Factors' of a term 5:34
Lecture 29 Tree diagram 2:13
Lecture 30 'Numerical factor' and 'Variable factor' 3:32
Lecture 31 What are 'Coefficients' 12:0
Lecture 32 'Numerical coefficient' and 'Literal coefficient' 8:41
Lecture 33 What are 'Like terms' 8:18
Lecture 34 What are 'Unlike terms' 3:8
Lecture 35 How to add or subtract 'terms' 5:17
Lecture 36 How to add or subtract 'like terms' 9:1
Lecture 37 How to add or subtract 'Unlike terms' 5:36
Lecture 38 How to add or subtract 'Algebraic expressions' 13:54
Lecture 39 How to multiply 'terms' 3:56
Lecture 40 How to multiply two 'algebraic expressions' 6:50
Lecture 41 Finding the value of an algebraic expression 6:37

Section 4 : Algebra Polynomials

Lecture 42 Polynomial - Introduction 0:38
Lecture 43 A variable to the power whole number 1:51
Lecture 44 (Constant) X (A variable to the power whole number) 7:9
Lecture 45 What is a 'Polynomial in 1 variable' 14:59
Lecture 46 What is a 'Constant polynomial' 3:5
Lecture 47 'Terms' of a polynomial 13:3
Lecture 48 'Coefficients' of terms of a polynomial 5:32
Lecture 49 'Degree' of a polynomial in 1 variable 12:7
Lecture 50 Summary of concepts 6:20
Lecture 51 Classification of polynomials 1:53
Lecture 52 What is a 'Linear polynomial' 10:25
Lecture 53 What is a 'Quadratic polynomial' 9:33
Lecture 54 What is a 'Cubic polynomial' 9:8
Lecture 55 'Constant polynomial' - Revisited 4:59
Lecture 56 Summary of polynomials based on 'degree' 7:52
Lecture 57 Degree table of polynomials 6:21
Lecture 58 Classifying polynomials on 'Number of terms' 6:25
Lecture 59 Polynomials in more than 1 variable 7:4

Section 5 : Algebra Linear equation in 1 variable

Lecture 60 What are 'variables' and 'constants' 8:20
Lecture 61 What is an 'Expression' 5:39
Lecture 62 Problem session - variables, constants and expressions 1:29
Lecture 63 What is an 'Equation' 10:14
Lecture 64 Parts of an equation 18:24
Lecture 65 What is 'Equation in 1 variable' 8:45
Lecture 66 Problem session - On identifying equation in 1 variable 3:58
Lecture 67 Problem session - On identifying equation in 1 variable 3:17
Lecture 68 What is 'Linear equation in 1 variable' 7:58
Lecture 69 Problem session - Identifying 'Linear equation in 1 variable' 6:29
Lecture 70 'Solution' or 'root' of an equation - Part 1 8:23
Lecture 71 'Solution' or 'root' of an equation - part 2 11:19
Lecture 72 'Solution' or 'root' of an equation - part 3 0:47
Lecture 73 Number of roots of an equation 8:40
Lecture 74 Plotting the roots of an equation 2:47
Lecture 75 'Solution' or 'root' of a L 9:9
Lecture 76 Why is a Linear equation called 'Linear' 2:11
Lecture 77 Problem session - Understanding the meaning of solution 4:34
Lecture 78 Problem session - Understanding the meaning of solution 3:22
Lecture 79 Problem session - Understanding the meaning of solution 6:36
Lecture 80 What is 'Solving a L 1:42
Lecture 81 Two methods of solving LE1V 1:20
Lecture 82 Trial and Error method of solving L 9:31
Lecture 83 Problem session - Trial and Error method 9:37
Lecture 84 Problem session - Trial and Error method 9:4
Lecture 85 Demerits of Trial and Error method 2:7
Lecture 86 An equation as a weighing balance 4:29
Lecture 87 Properties of a balanced equation 13:11
Lecture 88 Gist of properties of balanced equation 6:59
Lecture 89 Systematic method of solving L 9:5
Lecture 90 Problem session - Systematic method - Part 1 11:11
Lecture 91 What is 'Transposition' 7:26
Lecture 92 Problem session - Systematic method - Part 2 7:19
Lecture 93 Problem session - Systematic method - Part 3 10:1
Lecture 94 Problem session - Systematic method - Part 4 9:2
Lecture 95 Problem session - Systematic method - Part 5 6:47
Lecture 96 Problem session - Systematic method - Part 6 10:15
Lecture 97 Problem session - Systematic method - Part 7 13:59
Lecture 98 Setting up an equation 4:49
Lecture 99 Problem session - Converting statements to equations 5:5
Lecture 100 Problem session - Setting up equations 7:11
Lecture 101 Problem session - Word problems 20:25
Lecture 102 Problem session - Word problems 18:9
Lecture 103 Problem session - Word problems 10:58
Lecture 104 Checking the solution 6:52
Lecture 105 Problem session - Checking the solution 6:53
Lecture 106 Plotting the solution of LE1V 2:58
Lecture 107 Problem session - Plotting solution of LE1V 7:44
Lecture 108 Standard form of a LE1V 6:55
Lecture 109 Problem session - Writing LE1V in standard form 6:3
Lecture 110 Problem session - Overall chapter in one session 11:47
Lecture 111 Revision of the chapter - Part 1 8:50
Lecture 112 Revision of the chapter - Part 2 4:26
Lecture 113 Revision of the chapter - Part 3 21:36
Lecture 114 Revision of the chapter - Part 4 6:24
Lecture 115 Revision of the chapter - Part 5 12:24
Lecture 116 Revision of the chapter - Part 6 13:0
Lecture 117 Revision of the chapter - Part 7 8:7

Section 6 : Plane Geometry Introduction

Lecture 118 Break up of the word 'Geometry' 6:1
Lecture 119 What is 'Geometry' 3:50
Lecture 120 How did Geometry evolve 7:6
Lecture 121 2 Types of Geometries 3:24
Lecture 122 Which Geometry will we study 2:12
Lecture 123 Geometry of the Universe 0:56
Lecture 124 Who is the 'Father of Geometry' 1:22
Lecture 125 Who gave the 'first known proof' 1:45
Lecture 126 Who is a 'Geometer' 0:54

Section 7 : Plane Geometry Meaning of 'Axioms' & 'Theorems'

Lecture 127 Two types of 'Statements' in Mathematics 1:38
Lecture 128 Axioms or Postulates 5:1
Lecture 129 Theorems or Propositions 3:6

Section 8 : Plane Geometry PLANE

Lecture 130 What is a 'Plane' 4:25

Section 9 : Plane Geometry POINT

Lecture 131 Definition of 'Point' 1:16
Lecture 132 Why is a 'Point' not defined in Geometry 7:28
Lecture 133 A Point is a 'Primitive Object' 2:50
Lecture 134 Characteristics of a Point 3:37
Lecture 135 How to represent a Point 4:55
Lecture 136 How to draw a Point on paper 1:55
Lecture 137 How to denote a Point 1:45
Lecture 138 Practical examples of a Point 1:42

Section 10 : Plane Geometry LINE SEGMENT

Lecture 139 Definition of a Line-segment 3:6
Lecture 140 Definition of a Line-segment from a Line 3:18
Lecture 141 Another word for Line-segment 0:58
Lecture 142 How to denote a Line-segment 2:13
Lecture 143 'Line-segment AB' vs 'Line-segment BA' 1:2
Lecture 144 The length of a Line-segment 5:32
Lecture 145 Characteristics of a Line-segment 3:41
Lecture 146 How to compare lengths of Line-segments 10:49
Lecture 147 Practical examples of Line-segments 3:58

Section 11 : Plane Geometry LINE

Lecture 148 Definition of 'Line' 0:54
Lecture 149 Why is a 'Line' not defined in Geometry 4:20
Lecture 150 Line is a 'Primitive Object' 1:42
Lecture 151 What is a 'Straight Line' 3:34
Lecture 152 Defining a line from a Line-segment
Lecture 153 Defining a Line from 'Intersecting planes' 1:48
Lecture 154 Complete picture of a Line cannot be drawn 1:43
Lecture 155 How to denote a Line 1:46
Lecture 156 'Line AB' vs 'Line BA' 0:43
Lecture 157 Characteristics of a Line 3:25
Lecture 158 How many Lines can be drawn passing through 1 given point 1:8
Lecture 159 How many Lines can be drawn passing through 2 given points 0:54
Lecture 160 Two points fix a line 1:53
Lecture 161 What are Collinear points 3:6
Lecture 162 What are Non-collinear points 1:36
Lecture 163 What are Concurrent lines 2:55
Lecture 164 Practical examples of lines 2:36

Section 12 : Plane Geometry RAY

Lecture 165 What is a 'Ray' 2:38
Lecture 166 Definition of a 'Ray' from a 'Line' 2:19
Lecture 167 Definition of a 'Ray' from a 'Line-segment' 2:30
Lecture 168 About the complete picture of a Ray 1:20
Lecture 169 How to denote a Ray 1:20
Lecture 170 Starting point of a Ray AB 1:12
Lecture 171 'Ray AB' vs 'Ray BA' 2:28
Lecture 172 Number of rays that can be drawn from a 'Starting point' 1:36
Lecture 173 Ray from 2 given points 2:13
Lecture 174 Characteristics of a ray 3:5
Lecture 175 Practical examples of rays 2:32

Section 13 : Plane Geometry 'LINE' vs 'LINE SEGMENT' vs 'RAY'

Lecture 176 'Line' vs 'Line segment' vs 'Ray' 8:11

Section 14 : Plane Geometry ANGLE

Lecture 177 Origin of the word 'Angle' 2:6
Lecture 178 What is an 'Angle' 8:51
Lecture 179 Symbol for Angle 0:52
Lecture 180 How to denote an angle 8:49
Lecture 181 What is the 'Measure of an angle' 2:21
Lecture 182 How to denote the 'Measure of an angle' 4:36
Lecture 183 What is 'One Complete Revolution' 3:38
Lecture 184 What is 'Complete angle' or 'Full angle' 2:6
Lecture 185 What is 'Straight angle' 2:37
Lecture 186 What is 'Right angle' 5:23
Lecture 187 'Three-fourth' of a revolution has no special name 4:37
Lecture 188 Relation among a 'Complete angle', a 'Straight angle' and a 'Right angle' 4:45
Lecture 189 Comparison among a 'Complete angle', a 'Straight angle' and a 'Right angle' 1:41
Lecture 190 Systems of measuring angle 1:42
Lecture 191 Centesimal system (French system) 8:6
Lecture 192 Sexagesimal system (English system) 11:2
Lecture 193 Circular system 2:49
Lecture 194 Degree measurement of a complete angle, a straight angle and a right angle 4:45
Lecture 195 Types of angles 13:21
Lecture 196 Examples of 7 types of angles 4:52
Lecture 197 Comparison among 7 types of angles 2:44
Lecture 198 Automatic formation of Reflex angle 2:23
Lecture 199 Distinction between an angle and its reflex counterpart 3:9
Lecture 200 Two important results 9:35
Lecture 201 How to compare angles 9:53
Lecture 202 Instrument to measure an angle 3:9
Lecture 203 An angle leads to 3 divisions of a region 9:12
Lecture 204 Practical examples of angles 2:58

Section 15 : Plane Geometry Pairs of Angles

Lecture 205 Pairs of Angles 1:51
Lecture 206 Complementary angles 7:40
Lecture 207 Supplementary angles 7:38
Lecture 208 Adjacent angles 10:53
Lecture 209 Linear pair of angles 3:16
Lecture 210 Linear Pair Axiom 6:22
Lecture 211 Vertically opposite angles 2:58
Lecture 212 Theorem concerning 'Vertically opposite angles' 6:38
Lecture 213 'Linear pair axiom' vs 'Vertically opposite angles theorem' 3:34

Section 16 : Plane Geometry Pairs of Lines

Lecture 214 Pairs of Lines - Introduction 1:9
Lecture 215 Parallel Lines 6:17
Lecture 216 Intersecting Lines 4:14
Lecture 217 Perpendicular Lines 9:46
Lecture 218 'Perpendicular bisector' of a line segment 11:1
Lecture 219 What are 'Transversals' 7:47
Lecture 220 Angles made by a transversal 4:31
Lecture 221 'Exterior Angles' made by a transversal 2:50
Lecture 222 'Interior Angles' made by a transversal 2:35
Lecture 223 Pairs of exterior angles on same side of transversal 2:49
Lecture 224 Pairs of interior angles on same side of transversal 3:6
Lecture 225 Pairs of corresponding angles formed by a transversal 6:36
Lecture 226 Pairs of Alternate interior angles formed by a transversal 5:2
Lecture 227 Pairs of Alternate exterior angles formed by a transversal 2:37
Lecture 228 Revision of all types of angles formed by transversal 7:52

Section 17 : Plane Geometry Parallel lines & a Transversal

Lecture 229 Parallel lines and a transversal - Introduction 5:19
Lecture 230 Corresponding angles axiom 6:25
Lecture 231 Alternate angle theorem 4:49
Lecture 232 Proof of 'Alternate angle theorem' 4:58
Lecture 233 Theorem regarding interior angles on same side of transversal 4:0
Lecture 234 Proof of theorem regarding interior angles on same side of transversal 4:22
Lecture 235 Most important result (for competitions) 6:23

Section 18 : Plane Geometry CURVE

Lecture 236 What is a 'Curve' 6:59
Lecture 237 Two types of curves 0:37
Lecture 238 What is 'Open curve' 1:47
Lecture 239 What is 'Closed curve' 3:4
Lecture 240 What is 'Simple curve' 2:2
Lecture 241 What is 'Simple Closed Curve' 3:36
Lecture 242 A 'Simple Closed Curve' leads to 3 divisions of a region 12:39

Section 19 : Plane Geometry POLYGON

Lecture 243 What is a 'Polygon' 6:55
Lecture 244 What are 'Sides' or 'Edges' of a polygon 3:0
Lecture 245 What are 'Vertices' or 'Corners' of a polygon 3:31
Lecture 246 What are 'Adjacent sides' of a polygon 2:20
Lecture 247 What are 'Adjacent vertices' of a polygon 2:27
Lecture 248 What is 'Diagonal' of a polygon 8:41
Lecture 249 A polygon leads to 3 divisions of a region 4:16
Lecture 250 Angles in a polygon 16:23
Lecture 251 What are 'Adjacent angles' in a polygon 3:1
Lecture 252 Quick recapitulation 10:26
Lecture 253 Types of Polygons 0:42
Lecture 254 What is 'Convex polygon' 11:26
Lecture 255 What is 'Concave polygon' 10:57
Lecture 256 Names of some polygons 9:17
Lecture 257 Types of Convex polygon 0:52
Lecture 258 What is 'Regular polygon' 7:32
Lecture 259 What is 'Irregular polygon' 1:21

Section 20 : Plane Geometry TRIANGLE

Lecture 260 What is a 'Triangle' 9:14
Lecture 261 How to denote a triangle 3:16
Lecture 262 'Interior', 'On' and 'Exterior' of a triangle 6:8
Lecture 263 'Sides' of a Triangle 2:14
Lecture 264 'Vertices' of a Triangle 2:8
Lecture 265 'Adjacent sides' of a Triangle 2:33
Lecture 266 'Adjacent vertices' of a Triangle 2:24
Lecture 267 Sides opposite to vertices 3:28
Lecture 268 Vertices opposite to sides 3:2
Lecture 269 Interior angles of a triangle 2:40
Lecture 270 Exterior angles of a triangle 5:29
Lecture 271 'Diagonals' of a triangle 1:15
Lecture 272 Elements in a triangle 6:38
Lecture 273 'Angle sum property' of a triangle 16:24
Lecture 274 'Exterior angle property' of a triangle 8:57
Lecture 275 Types of triangles 2:48
Lecture 276 Types of triangles based on 'sides'
Lecture 277 Types of triangles based on 'angles' 10:50
Lecture 278 Inequalities in a triangle - Introduction 1:56
Lecture 279 Inequalities in a triangle - The 1st inequality 15:40
Lecture 280 Inequalities in a triangle - The 2nd inequality 15:5
Lecture 281 Inequalities in a triangle - 1st and 2nd inequalities 3:26
Lecture 282 Inequalities in a triangle - The 3rd inequality 4:24
Lecture 283 Inequalities in a triangle - The 4th inequality 5:48
Lecture 284 Bound on a side of a triangle 5:50
Lecture 285 Special lines and special line-segments in a triangle 2:31
Lecture 286 'Medians' in a triangle 15:49
Lecture 287 'Centroid' or 'Gravity centre' of a triangle 5:46
Lecture 288 'Altitudes' in a triangle 18:49
Lecture 289 'Orthocenter' of a triangle 5:52
Lecture 290 'Interior angle bisectors' in a triangle 16:18
Lecture 291 'Incentre' of a triangle 5:23
Lecture 292 'Side perpendicular bisectors' in a triangle 19:41
Lecture 293 'Circumcenter' of a triangle 8:16
Lecture 294 All 4 centres in a sample triangle 7:7
Lecture 295 Right-angled triangle 10:36
Lecture 296 Pythagoras theorem 2:51

Section 21 : Plane Geometry QUADRILATERAL

Lecture 297 What is a 'Quadrilateral' 2:42
Lecture 298 'Interior', 'On' and 'Exterior' of a quadrilateral 6:12
Lecture 299 'Sides' or 'Edges' of a Quadrilateral 1:53
Lecture 300 'Vertices' or 'Corners' of a Quadrilateral 1:39
Lecture 301 'Adjacent sides' of a Quadrilateral 2:10
Lecture 302 'Adjacent vertices' of a Quadrilateral 1:45
Lecture 303 'Opposite sides' of a Quadrilateral 2:50
Lecture 304 'Opposite vertices' of a Quadrilateral 2:17
Lecture 305 'Interior angles' of a Quadrilateral 2:22
Lecture 306 'Exterior angles' of a Quadrilateral 3:47
Lecture 307 'Adjacent interior angles' of a Quadrilateral 2:32
Lecture 308 'Opposite interior angles' of a Quadrilateral 3:30
Lecture 309 'Diagonals' of a Quadrilateral 2:14
Lecture 310 Elements in a Quadrilateral 4:26
Lecture 311 Two types of quadrilaterals 10:9
Lecture 312 Angle sum property of a quadrilateral 10:44
Lecture 313 5 Types of quadrilaterals 0:54
Lecture 314 What is a 'Trapezium' 1:44
Lecture 315 What is a 'Parallelogram' 2:11
Lecture 316 What is a 'Rhombus' 2:29
Lecture 317 What is a 'Rectangle' 2:57
Lecture 318 What is a 'Square' 3:29
Lecture 319 'Family tree' of quadrilaterals 4:26

Section 22 : Plane Geometry Circle

Lecture 320 Introduction to Circle 3:43
Lecture 321 What is a 'Circle' 13:36
Lecture 322 A circle is a 'Simple closed curve' 2:37
Lecture 323 A circle leads to 3 divisions of a region 6:3
Lecture 324 What is 'Centre' of a circle 4:7
Lecture 325 What is 'Radius' of a circle 5:8
Lecture 326 Distance of a point from the centre of a circle 6:24
Lecture 327 What is 'Chord' of a circle 5:25
Lecture 328 What is 'Diameter' of a circle 6:22
Lecture 329 What is 'Arc' of a circle 10:18
Lecture 330 What is 'Circumference' of a circle 3:23
Lecture 331 What is 'Semi-circle' 3:42
Lecture 332 'Chord associated with an arc' and vice-versa 2:15
Lecture 333 What is 'Sector' 8:49
Lecture 334 Two types of quadrilaterals 10:9
Lecture 335 Differences in diagrams of 'Arc', 'Segment' and 'Sector' 3:32
Lecture 336 What is 'Semi-circular region' 3:8
Lecture 337 'Quadrant' of a circle 3:28
Lecture 338 Circles passing through 1 given point in a plane 2:22
Lecture 339 Circles passing through 2 given points in a plane 3:35
Lecture 340 Circle passing through 3 given points in a plane 10:39
Lecture 341 What are 'Concentric circles' and 'Annulus' 4:19
Lecture 342 What is a 'Cyclic quadrilateral' 2:18
Lecture 343 What is a 'Secant' 2:22
Lecture 344 'Chord associated with a secant' and vice-versa 3:0
Lecture 345 What is a 'Tangent' 15:29
Lecture 346 Number of tangents from a point to a circle 8:58
Lecture 347 Which Instrument is used to construct a circle 1:38

Section 23 : 3 Dimensional geometry

Lecture 348 What is a 1D shape 3:5
Lecture 349 What is a 2D shape 4:10
Lecture 350 What is a 3D shape
Lecture 351 Five 3D shapes that we will study 0:44
Lecture 352 What is a 'Cuboid' 7:23
Lecture 353 What is a 'Cube' 3:16
Lecture 354 What is a 'Cylinder' 3:49
Lecture 355 What is a 'Cone' 3:10
Lecture 356 What is a 'Sphere' 2:53
Lecture 357 Problem session - Mixed problems 3:37

Section 24 : Symmetry

Lecture 358 Two types of symmetries 0:51
Lecture 359 What is 'mirror image' of an object 2:14
Lecture 360 How to draw 'mirror images' - Introduction 0:56
Lecture 361 How to draw mirror image of a 'point' 4:44
Lecture 362 Problem session - Mirror image of a 'point' 4:36
Lecture 363 How to draw mirror image of a 'plane figure' 5:23
Lecture 364 Problem session - Mirror image of a 'plane figure' 5:1
Lecture 365 What is 'Linear symmetry' 3:59
Lecture 366 Test of 'Linear symmetry' 3:19
Lecture 367 Problem session - Line of symmetry 4:11
Lecture 368 Problem session - Line of symmetry 2:27
Lecture 369 Problem session - Line of symmetry 1:59
Lecture 370 Problem session - Line of symmetry 2:8
Lecture 371 Line of symmetries of some standard figures 11:8
Lecture 372 Problem session - Line of symmetry 1:42
Lecture 373 Problem session - Line of symmetry 6:22
Lecture 374 Problem session - Line of symmetry 4:12
Lecture 375 Line of symmetries of English alphabets 2:11
Lecture 376 Problem session - Symmetries of Alphabets 4:57

Section 25 : Geometrical constructions

Lecture 377 Introduction to 'Geometrical Constructions' 2:26
Lecture 378 Constructing a circle of given radius 1:56
Lecture 379 Previous construction on notebook 3:21
Lecture 380 Constructing a line segment of given length 2:57
Lecture 381 Previous construction on notebook 4:38
Lecture 382 Constructing a copy of a given line segment 1:51
Lecture 383 Previous construction on notebook 3:17
Lecture 384 Constructing the perpendicular bisector of a line segment 4:9
Lecture 385 Previous construction on notebook 8:56
Lecture 386 Constructing an equilateral triangle 1:46
Lecture 387 Previous construction on notebook 3:47
Lecture 388 Constructing a perpendicular to a line through a point on it 4:38
Lecture 389 Construction 7 on copy 9:32
Lecture 390 Constructing a perpendicular to a line through a point not on it 4:54
Lecture 391 Construction 8 on copy 7:21
Lecture 392 Constructing an angle using protractor 2:20
Lecture 393 Constructing an angle using protractor 2:53
Lecture 394 Constructing a copy of a given angle 2:53
Lecture 395 Constructing a copy of a given angle 4:44
Lecture 396 Constructing bisector of a given angle 3:0
Lecture 397 Constructing bisector of a given angle 4:11
Lecture 398 Constructing 60 deg, 120 deg, 180 deg and 90 deg 9:24
Lecture 399 Constructing 60 deg, 120 deg, 180 deg and 90 deg 6:30
Lecture 400 Constructing multiples of 15 degrees 9:50
Lecture 401 Constructing multiples of 15 degrees 11:56

Section 26 : Mensuration

Lecture 402 What is 'Mensuration' 3:36
Lecture 403 What is 'perimeter' 5:34
Lecture 404 Problem session - Finding perimeter 4:36
Lecture 405 Perimeter of some standard figures
Lecture 406 Problem session - Perimeter of rectangle 13:33
Lecture 407 Problem session - Perimeter or rectangle 10:19
Lecture 408 Problem session - Perimeter of square 11:57
Lecture 409 Problem session - Perimeter of miscellaneous shapes 9:11
Lecture 410 What is 'area' 2:39
Lecture 411 Area of rectangle and square 4:11
Lecture 412 Problem session - Rectangle and square 12:29
Lecture 413 Problem session - Square 12:33
Lecture 414 Problem session - Rectangle and square 11:59
Lecture 415 Problem session - Rectangle and square 9:54
Lecture 416 Circle - Circumference and area 7:42
Lecture 417 Problem session - Mensuration of circle 10:29
Lecture 418 Estimating area by counting squares 4:13
Lecture 419 Problem session - Estimating area by counting squares 2:57

Section 27 : Statistics

Lecture 420 What is 'Data' 4:24
Lecture 421 The word 'statistics' 2:6
Lecture 422 Meaning of the word 'statistics' as plural noun 1:44
Lecture 423 Meaning of the word 'Statistics' as singular noun 2:7
Lecture 424 Definition of 'Statistics' 2:1
Lecture 425 Stages of statistical study 3:1
Lecture 426 Stage 1 - Collection of data 7:5
Lecture 427 Stage 2 - Organisation of data 2:58
Lecture 428 What is 'Array' 5:45
Lecture 429 What is 'Frequency distribution table' 13:18
Lecture 430 Problem session - Tally Marks 1:25
Lecture 431 'Array' vs 'Frequency distribution table' 10:15
Lecture 432 Problem session - 'Array' and 'Frequency distribution table' 9:29
Lecture 433 Problem session - Interconverting 'Array' and 'Freq dist table' 2:24
Lecture 434 Problem session - 'Tally Marks' and 'Frequency' 1:13
Lecture 435 Problem session - Frequency distribution table
Lecture 436 Stage 3 - Presentation of data 2:33
Lecture 437 What is 'Pictograph' 9:39
Lecture 438 Problem session - Pictograph 1:15
Lecture 439 Problem session - Pictograph 6:10
Lecture 440 Problem session - Pictograph 11:47
Lecture 441 Demerits of 'Pictograph' 3:43
Lecture 442 What is 'Bar graph' 10:49
Lecture 443 Problem session - Bar graph 1 3:6
Lecture 444 Problem session - Bar graph 2 7:49
Lecture 445 Problem session - Bar graph 3 6:44
Lecture 446 Problem session - Bar graph 4 4:7
Lecture 447 Problem session - Bar graph 5 2:37
Lecture 448 Stages 4 and 5 - Analysis and interpretation of data 4:39
Lecture 449 What is 'Mean' 4:46
Lecture 450 How to calculate 'mean' 6:24
Lecture 451 What is 'Median' 18:27
Lecture 452 How to calculate 'median' 7:12
Lecture 453 What is 'Mode' 9:8
Lecture 454 How to calculate 'mode' 2:29
Lecture 455 What is 'Range' 3:8
Lecture 456 How to calculate 'range' 2:29
Lecture 457 Problem session - Mean, median, mode, range 6:23
Lecture 458 Problem session - Mean, median, mode, range 10:2
Lecture 459 Problem session - Mean, median, mode, range 6:11
Lecture 460 Problem session - Mean, median, mode, range 7:10
Lecture 461 Properties of mean, median and mode 4:47

Section 28 : Trigonometry Introduction

Lecture 462 Trigonometry - Introduction 0:52
Lecture 463 Division of the word 'Trigonometry' 2:11
Lecture 464 What is 'Trigonometry' 5:8
Lecture 465 What will we study in 'Trigonometry' 2:28

Section 29 : Trigonometry The required background

Lecture 466 The required background 0:40
Lecture 467 Basics of a right angled triangle 5:35
Lecture 468 How to identify 'sides' opposite to 'angles' in a triangle 6:44
Lecture 469 Problem session - Identifying 'sides' opposite to 'angles' 3:52
Lecture 470 How to identify 'hypotenuse' 3:22
Lecture 471 Problem session - Identifying the 'hypotenuse' 2:12
Lecture 472 Side adjacent to an acute angle in a right angled triangle 5:31
Lecture 473 Problem session - Mixed 4:6
Lecture 474 'Ratios of sides' in a right angled triangle 5:1
Lecture 475 Problem session - Writing all the 6 ratios of pairs of sides 6:34

Section 30 : Trigonometry Trigonometric ratios of acute angles

Lecture 476 Introduction to Trigonometric ratios 4:47
Lecture 477 Glimpse to Trigonometric ratios 5:36
Lecture 478 Definition of Trigonometric ratios 9:45
Lecture 479 How to find the 'sine' of an acute angle of a right triangle 2:57
Lecture 480 Problem session - Finding 'sine' 5:4
Lecture 481 How to find the 'cosine' of an acute angle of a right triangle 2:45
Lecture 482 Problem session - Finding 'cosine' 3:12
Lecture 483 How to find the 'tangent' of an acute angle of a right triangle 2:58
Lecture 484 Problem session - Finding 'tangent' 2:38
Lecture 485 How to find the 'cosecant', 'secant' and 'cotangent' 5:22
Lecture 486 Problem session - Finding 'cosecant', 'secant', 'cotangent' 7:16
Lecture 487 Problem session - Finding all trigonometric ratios 3:43
Lecture 488 Problem session - Finding all trigonometric ratios 2:47

Section 31 : Coordinate Geometry

Lecture 489 What is coordinate geometry 9:18
Lecture 490 Another name of coordinate geometry 1:22
Lecture 491 Problem session 1:10
Lecture 492 Who invented coordinate geometry 1:10
Lecture 493 What are 'Coordinate axes' 20:8
Lecture 494 What is 'x-axis' 8:11
Lecture 495 What is 'y-axis' 7:8
Lecture 496 Problem session - On coordinate axes 2:47
Lecture 497 What is 'Origin' 3:25
Lecture 498 What is 'coordinate plane' 8:14
Lecture 499 What are 'Quadrants' 8:14
Lecture 500 What is 'x-coordinate' or 'abscissa' of a point 16:45
Lecture 501 What is 'y-coordinate' or 'ordinate' of a point 12:57
Lecture 502 'Cartesian coordinates' of a point - Part 1 16:0
Lecture 503 'Cartesian coordinates' of a point - Part 2 17:14
Lecture 504 Summary of coordintates of a point 4:29
Lecture 505 Problem session - Writing and plotting coordinates 5:15
Lecture 506