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29-04-2017
Mathematics

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29-04-2017

2a + 2b = The perimeter. You know one side (5cm) and the total perimeter (30cm)So your equation should be 2(5) + 2(b) = 30. From here you simply solve for "b" 2(b) = 30 -10 2(b) = 20 b = 20/2 b is equal to 10cm.

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