Photos 2A 2B C A B

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2a 2b c a b. A^2+B^2=C^2. A 2 B 2 C 2 2ab 2bc 2ac. Cosa b2+c2-a2. A2 b2 c2 2bc cos a.
A^2+B^2=C^2. A 2 B 2 C 2 2ab 2bc 2ac. Cosa b2+c2-a2. A2 b2 c2 2bc cos a.

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