The best statement of the angle-angle similarity theorem is (a) When the preimage of a triangle is a dilation of the image, the triangles are similar.
The angle-angle similarity theorem is used in similar triangles; especially when a triangle is dilated (i.e. resized) to form another triangle
When triangles are dilated, the corresponding angles in both triangles (i.e. the image and the pre-image) are always equal
Hence, the best statement of the angle-angle similarity theorem is (a)
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