angle-angle criterion - If 2 interior angles of two triangles are congruent, the 2 triangles are similar, congruent angles - angles that have the same shape and size, corresponding angles - angles that are in the same position, corresponding sides - sides that are in the same position, scale factor - the ratio of any two corresponding edge lengths, similar triangles - triangles that are the same shape but a different size - have corresponding angles equal and corresponding sides in the same ratio, similar - having the same shape but not necessarily the same size,

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