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19-05-2016
Mathematics

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the formula for the area of a trapezoid is A=1/2h (b1+b2) express b1 in terms of A, h, and b2

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19-05-2016

A=1/2h(b₁+b₂)
1/2h(b₁+b₂)=A
(b₁+b₂)=2A/h
b₁=2A/h - b₂

answer: b₁=2A/h - b₂

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