year 8 maths

3M
Calculating the length of a shorter side
183
Example 27
3 Find the length of the unknown side in these right-angled triangles.
a
b 12 c
5
3
a
15
a
9
41
b
d
b
e 30
a
f
b 11
17
34
61
8
4 Find the length of the unknown side in these right-angled triangles, giving the answer correct
to two decimal places.
a 2
b
c
14
2 5
8
3
d
e
f
50
22
18
14
100
9
PROBLEM-SOLVING AND REASONING
5, 6, 9 5–7, 9, 10
6–8, 10, 11
Example 28
5 A yacht’s mast is supported by a 12 m cable attached to its top. On the deck of the yacht, the cable
is 8 m from the base of the mast. How tall is the mast? Round the answer to two decimal places.
12 m
8 m
Deck
Cambridge Maths NSW
Stage 4 Year 8 Second edition
ISBN 978-1-108-46627-1 © Palmer et al. 2018
Cambridge University Press
Photocopying is restricted under law and this material must not be transferred to another party.