CAMBRIDGE LOWER SECONDARY MATHEMATICS 9: END OF UNIT 5 TEST ANSWERS
Stage 9 End of unit 5
The tests and mark schemes have been written by the authors. These may not fully reflect the approach of Cambridge Assessment International
Education.
Answers
1 Show a hexagon divided into 4 triangles.
[2]
4 × 180 = 720 °
2 a
[2]
6 × 180 = 1080 °
b 135 ° (allow follow through from incorrect answer to part a)
[1]
3 360 − (52 + 55 + 58 + 61 + 64) = 360 − 290 = 70 °
[2]
4 a 35 °
[1]
b 120 °
[1]
5
132 − 122 = 5 (1 mark for 5 if no method shown)
[2]
6
4.52 + 7.52 = 76.5 = 8.7 or 8.75 m
[2]
7 a Use of compasses to draw sides seen.
Sides correct to within 2 mm.
[2]
b Use of compasses to construct perpendicular bisector of the 8.5 cm side.
Two parts of line are between 4.2 and 4.3 cm and angle is between 88 ° and 92 °.
[2]
8 Evidence of construction of 90 °, bisection to give 45 ° and bisection of 45 °.
Error less than 2 °.
[3]
[Total: 20 marks]
Cambridge Lower Secondary Mathematics 9 – Byrd, Byrd & Pearce © Cambridge University Press 2021
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