Page 6 - Mathematics Class - IX

CONTENTS

Learn Me Everyday 6

Conversions 7
Useful Mathematical Symbols 7

ACTIVITIES

UNIT - 1: Number Systems

1.1. To construct a square root spiral. 9

1.2. To represent some irrational numbers on the number line. 12

UNIT - 2: Algebra

2.1. To verify the algebraic identity: (a + b + c) = a + b + c + 2ab + 2bc + 2ca 16
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2.2. To verify the algebraic identity: (a + b) = a + 3a b + 3ab + b 3 19
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2.3. To verify the algebraic identity: (a – b) = a – 3a b + 3ab – b 3 22
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2.4. To verify the algebraic identity: a + b = (a + b) (a – ab + b ) 25
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2.5. To verify the algebraic identity: a – b = (a – b) (a + ab + b ) 28
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UNIT - 3: Coordinate Geometry
3.1. To find the values of abscissae and ordinates of various points given in a Cartesian plane. 32
3.2. To find a hidden picture by plotting and joining the various points with given coordinates in a plane. 35
UNIT - 4: Geometry

4.1. To verify experimentally that if two lines intersect, then – 39

(a) Vertically opposite angles are equal

(b) The sum of two adjacent angles is 180°

(c) The sum of all the four angles is 360°