year 8 maths

348 Chapter 6 Angle relationships and properties of geometrical figures 1
1 Find the value of a in these diagrams.
a
b
c
Pre-test
a°
30°
a°
50°
2 Name these angles as acute, right, obtuse, straight, reflex or revolution.
a 360° b 90° c 37°
d 149° e 180° f 301°
a°
220°
3 This diagram includes a pair of parallel lines and a third line called a transversal.
a°
50°
c° b° e°
d°
g° f °
a What is the value of a ?
b Which pronumerals are equal in value to a ?
c Which pronumerals are equal in value to 50 ?
4 Name the triangle that best fits the description. Choose from scalene , isosceles , equilateral , acute ,
right or obtuse . Draw an example of each triangle to help.
a one obtuse angle b two equal-length sides
c all angles acute d three different side lengths
e three equal 60° angles f one right angle
5 Name the six special quadrilaterals. Draw an example of each.
6 Find the value of x in these shapes, using the given angle sum.
a Angle sum = 180°
x°
120°
20°
b Angle sum = 360°
x°
70°
7 Name each solid as a cube, a triangular prism or a pyramid.
a b c
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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