Page 192 - Cambridge+Checkpoint+Mathematics+Coursebook+9

13 Work out the size of each unknown angle in these diagrams.
Explain how you worked out your answers.

a°
35° e° 116°
f°
b° 42° d°
c°

Diagram not drawn accurately
14 Copy these 3D shapes and draw on them their planes of symmetry.
a b c

15 Ceri is looking into the age of the children at a youth Age (years) Tally Frequency
club. She uses this data-collection sheet.
She asks the children to say which age group they are in. 12–14
a Give two reasons why her data collection sheet is 14–16
not suitable. 16–18
b Design a better data-collection sheet.
Total

16 Sarah sews together two pieces of material to make a curtain.
3
2
The first piece of material is 1 m wide, the second is 2 m wide.
5 3
a What is the total width of the curtain?
b Show how to check your answer is correct. 1 3 m 2 2 m
5 3
17 Work out the answers to these. Diagram not drawn accurately
Write each answer in its simplest form and as a mixed number when appropriate.

a 1 × 36 b 2 × 15 c 9 ÷ 3 d 4 ÷ 12
8 5 16 8 5 25
18 Draw a line AB 8 cm long.
Mark the point C on the line, 3 cm from A. 8 cm
Construct the perpendicular at C, as shown in the diagram. A B
3 cm C
19 a Draw a circle of radius 5 cm.
b Using a straight edge and compasses, construct an inscribed regular hexagon.
Make sure you leave all your construction lines on your diagram. 5 cm
20 Work out the length of the side marked in each triangle.
Give each answer correct to one decimal place.
a b 16 m
8 cm

14 cm 7 m
Diagram not drawn accurately

End-of-year review 191