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SSS Similarity Theorem- If the corresponding side lengths of two triangles are proportional then the triangles are similar.
Practice Problem 1: Is triangle ABC similar to triangle DEF
AB=8 BC=12 CA=16 DE=2 EF=3 FD=4
AB/DE=BC/EF=CA/FD
8/12=16/4=12/3
8/12=4 16/4=4 12/3=4
4=4=4
Yes. They are similar.
AB/DE=BC/EF=CA/FD
8/12=16/4=12/3
8/12=4 16/4=4 12/3=4
4=4=4
Yes. They are similar.