year 8 maths

158 Chapter 3 Measurement and Pythagoras’ theorem
ENRICHMENT
– –
15
Having rectangular prisms
15 This question looks at using half of a rectangular prism to find the volume of
a triangular prism.
a Consider this triangular prism.
i Explain why this solid could be thought of as half a rectangular prism.
ii Find its volume.
b Using a similar idea, find the volume of these prisms.
i
ii
8 cm
5 m
4 cm
10 cm
7 m
8 m
iii
2 cm
iv
2 m
1 cm 2 cm
4 m
8 m
5 m
v
7 mm
6 mm
3 mm
2 mm
3 mm
vi
3 cm 4 cm
9 cm
5 cm
5 cm
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.