Images 2 1 ФИ

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2 1 фи. Ab2 ac2+bc2. Bc2 ab2+ac2-2ab AC cosa. A^2-ab/AC. AC^2=ab^2.
Ab2 ac2+bc2. Bc2 ab2+ac2-2ab AC cosa. A^2-ab/AC. AC^2=ab^2.

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