Mathematics · Oct / Nov 2020 · Paper 22 · Question 18
0580
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The sides of an isosceles triangle are measured correct to the nearest millimetre. One side has a length of 8.2 cm and another has a length of 9.4 cm. Find the largest possible value of the perimeter of this triangle. cm [3]
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27.15 cao [3]
M2 for (9.4 + 0.05) × 2 + 8.2 + 0.05 or better
or M1 for 8.2 + 0.05 or 9.4 + 0.05 or better seen OR
SC2 for answer 25.95
or SC1 for answer 26.85
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