Similar Triangles have the same angles (all 3) but different side lengths. We can solve for the missing side of a triangle by setting up a proportion and solving for the missing side. If we have a right triangle, remember that we can also use the Pythagorean Theorem to solve for a missing side.
In complicated diagrams, it often helps to redraw the similar triangles separately so that you can align your measurements properly. Sometimes you must look carefully to spot the similar triangles!
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