In an equilateral ΔABC, D is a point on side BC such that BD =13BC. Prove that 9(AD)2=7(AB)2. OR Prove that, in a right triangle, the square on the hyporenuse is equal to the sum of the squares on the other two sides.

In an equilateral ΔABC, D is a point on side BC such that BD =13BC. P

1.	In an equilateral ΔABC, D is a point on side BC such that BD =13BC. Prove that 9(AD)2=7(AB)2. OR Prove that, in a right triangle, the square on the hyporenuse is equal to the sum of the squares on the other two sides.
Answer» In an equilateral $Δ A B C,$ D is a point on side BC such that BD $= \frac{1}{3}$ BC. Prove that $9 (A D)^{2} = 7 (A B)^{2}$ . OR Prove that, in a right triangle, the square on the hyporenuse is equal to the sum of the squares on the other two sides.

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In an equilateral ΔABC, D is a point on side BC such that BD =13BC. Prove that 9(AD)2=7(AB)2. OR Prove that, in a right triangle, the square on the hyporenuse is equal to the sum of the squares on the other two sides.

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