Page 7 - Key Stage 3 Geometry

Contents

1 Contents of your Helix Oxford set of Mathematical
Instruments .......................................................................... 3

2 Angles and the Protractor ................................................. 6

2.1 The Protractor ........................................................... 11

Exercise 2-1 ..................................................................... 12

Exercise 2-2 ..................................................................... 13

Exercise 2-3 ..................................................................... 14

2.2 The Compasses .......................................................... 16
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Exercise 2-4: 60 Angle .................................................... 18
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Exercise 2-5: 30 Angle .................................................... 19
Exercise 2-6 ..................................................................... 21

Exercise 2-7 ..................................................................... 22

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Exercise 2-8: 90 Angle .................................................... 24
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Exercise 2-9: 45 Angle .................................................... 25
3 The Circle ......................................................................... 27

3.1 Inscribing Polygons in a Circle ................................... 28

Exercise 3.1: A Regular Triangle in a Circle...................... 29

Exercise 3.2: A Regular Quadrilateral in a Circle ............. 30

Exercise 3.3: A Regular Pentagon in a Circle ................... 33

Exercise 3.4: A Regular Hexagon in a Circle .................... 38
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