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If both the base and height of a triangle are made nine times as long, how many times the area of the original figure is the area of the new figure?



Answer :

To start: A = 1/2bh
Now by increasing both the width and height by 9, you get: A = 1/2(9b)(9h) = 1/2(81)bh

You can see that the increase in area is 81 times the original.

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