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posted by Deborah on Thursday, November 8, 2012 at 2:50pm.

A right triangle has an area of 13 m2. The dimensions of the triangle are increased by a scale factor of 3. What is the area of the new triangle? 39 m2 169 m2 117 m2 142 m2 I think it is A...?

nope. If each dimension is scaled by three, the area is scaled by 3^2, so (C). recall that the area a = 1/2 bh If b and h are replaced by 3b and 3h, then new area A = 1/2 (3b)(3h) = 1/2 9bh = 1/2 bh * 9, or 9a

177

yaya its 177 :D

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