Mathematics · Oct / Nov 2021 · Paper 21 · Question 15
0580
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NOT TO SCALE The diagram shows three shapes that are mathematically similar. The heights of the shapes are in the ratio small : medium : large = 1 : 5 : 8. Find the ratio shaded area : total unshaded area. Give your answer in its simplest form. : [4]
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3 : 5 nfww [4]
M3 for 52 – 1 oe and 82 – 52 + 1 oe
or M2 for 52 – 1 oe or 82 – 52 + 1 oe
or M1 for 52 oe or 82 oe seen
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