Q.1. In an isosceles triangle, AB=AC and BD is the altitude through B. Prove that BD2-CD2=2CD*AD

Q.2. In a right angled Triangle, prove that 4times the sum of the squares on the median drawn from the acute angles is equal to 5 times square on hypotenous.

Q3. In traingle ABC ,C=90 and AD, BE are medians through A and B respectively. Prove that 4AD2 =4AC2+BC2

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