Question

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The question: What theorem would you use to write proportion for this figure?

It's the same question for each problem.

Answer 1

To write a proportion for a given figure, we typically use the similar triangles theorem, also known as the AA similarity theorem. This theorem states that if two angles of one triangle are congruent to two angles of another triangle, then the two triangles are similar. This allows us to set up a proportion between corresponding sides of the similar triangles.