Shape and Space 5
1 mark · EasyTwo rectangles are similar. Rectangle X has sides 4 cm and 7 cm. Rectangle Y has sides 8 cm and k cm. Work out the value of k.
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14 cm
Also accept: 14 cm
Common mistakes: 11 cm (added not multiplied)
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Marking points
B1 · 1 mark · B1: Correct value of k = 14 cm
Worked solution
The scale factor is 8 ÷ 4 = 2. So, 7 × 2 = 14. k = 14 cm.