I introduce "Congruent Parts of Congruent Triangles are Congruent" and work through two proofs that used this concept. EXAMPLES AT 0:10 4:26 Find free review test, useful notes and more at [ Ссылка ] If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage www.YouTube.com/Profrobbob

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