Geometry 7.3a, AA, SSS, SAS Triangle Similarity

An explanation of the Angle-Angle (AA) Similarity postulate, the Side-Side-Side (SSS) Similarity theorem, and the Side-Angle-Side (SAS) Similarity theorem. Explaining why triangles are similar and writing a similarity statement to show corresponding parts. We verify triangle similarity using SSS, and we verify it using SAS. We find lengths in similar triangles by first proving the triangles are similar, then finding the missing length.

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