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A B C is a triangle in which A B=A C ...

`A B C` is a triangle in which `A B=A C` and `D` is any point in `B C` . Prove that `A B^2-A D^2=B D C D` .

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  2. In an isosceles triangle A B C with A B=A C , B D is perpendicul...

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  3. A B C is a triangle in which A B=A C and D is any point in B C ....

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