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In fig., if A D|B C, prove thatA B^2+C...

In fig., if `A D_|_B C`, prove that`A B^2+C D^2=B D^2+A C^2`.

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In `△ADC`, `∠ADC=90^@`
`∴(AC)^2=(AD) ^2+(CD) ^2` (By Pythagoras theorem) .......... (1) ...
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