80 degrees, 65 degrees, 90 degrees, 125 degrees, Two polygons are similar if ___________, corresponding angles are congruent, corresponding sides are proportional, both a and b, either a or b, Scale factor, common ratio of the corresponding sides, congruent sides of the polygons, common sides, same measure, , 2/3, 1/2, 2/5, 1/5, , 3, 9, 14, 21, , 2, 3, 18, 27.

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