year 8 maths

354 Chapter 6 Angle relationships and properties of geometrical figures 1
Example 1
4 Determine the value of the pronumerals, giving reasons.
a
b
c
20°
a° b°
65°
a°
b°
b°
52°
a°
d
a°
146°
b°
e
a°
35°
30°
f
a°
50°
g
h
i
a° 120°
120°
130°
a° b°
a°
130°
j
k
l
b°
a°
20°
32°
a°
a°
41°
b°
c°
5 Consider the given diagram.
a Name an angle that is:
i vertically opposite to ∠AOB
ii complementary to ∠BOC
iii supplementary to ∠AOE
iv supplementary to ∠AOC
b Copy and complete:
i AD ⟂ ____
ii ____ ⟂ OD
D
C
E
O
B
A
6 What is the complement of the following?
a 30° b 80° c 45° d 17°
7 What is the supplement of the following?
a 30° b 80° c 45° d 17°
e 120° f 95° g 135° h 167°
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
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