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What is the area of the trapezoid shown below?

 

 Aug 3, 2020
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Get the length, say h, of the dotted line using Pythagoras' theorem.  i.e.  h = sqrt(252 - 72)

 

Then either calculate the area of the triangle and the rectangle separately, or use the fact that the area of the trapezoid (1/2)(7+4 +4)*h.

 Aug 3, 2020

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