ConceptPythagoras Theorem

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#### Question

In an equilateral triangle ABC, D is a point on side BC such that BD = `1/3BC` . Prove that 9 AD^{2} = 7 AB^{2}

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#### Reference Material

Solution for question: In an Equilateral Triangle Abc, D is a Point on Side Bc Such that Bd = `1/3bc` . Prove that 9 Ad^2 = 7 Ab^2 concept: Pythagoras Theorem. For the course CBSE