Page 20 - Key Stage 3 Geometry

4. You will observe on the protractor, the angle you
o
have drawn is 60 .

Exercise 2-3

Using your protractor and ruler to draw a regular

pentagon (five sides). The internal angle of a pentagon
o
is 108 . Do the following.

1. Draw a horizontal line of 5 cm long and mark the

left end with a dot.

2. Place the protractor alone the line with the dot
under the cross-hairs and mark out an angle of

o
108 .
3. Place the ruler so that its edge touches both the
o
end of the line and 108 mark. Move the ruler
alone until the end of the line is on the 10 cm
mark.

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