Similar Triangle Math Fundamentals/Basics Quiz: Level 2 Q13

GRE Quant Problem Solving
1

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how are you supposed to be able to solve this problem? Even though the triangles are similar you don’t have a height to be able to multiply by?

The top triangle is \frac{1}{2} X H_1 = 5 but that doesn’t give me enough to determine the other lengths, right?

2

I figured it out. The specifics of X and H_1 don’t matter since they are both scaled by the same amount.

3

Yeah, specifics don’t matter. As long as you understand that both the smallest and the largest are similar you can express their areas as a ratio.