Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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Similar Triangles - Problem 1

Alissa Fong
Alissa Fong

MA, Stanford University
Teaching in the San Francisco Bay Area

Alissa is currently a teacher in the San Francisco Bay Area and Brightstorm users love her clear, concise explanations of tough concepts

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If two shapes are similar, like we're told these pairs are, then the angles are congruent and corresponding side lengths are proportional. You can set up many different possible proportions- just make sure that you are putting corresponding parts in the same part of the fraction. For example, for a parallelogram, you could do big top/big bottom = small top/small bottom, or you could do big top/small top= big bottom/small bottom, or even the reciprocal of either of those. Solve by cross multiplying.

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