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" ABCD" is a parallelogram and "EFCD" i...

`" ABCD"` is a parallelogram and `"EFCD"` is a rectangle. Also, `A L_|_D C`. Prove that:
(i) `a r\ (A B C D)\ =\ a r\ (E F C D)`
(ii) `a r\ (A B C D)\ =\ D C\ xx\ A L`

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To solve the problem, we need to prove two statements about the areas of the parallelogram \(ABCD\) and the rectangle \(EFCD\). ### Given: - \(ABCD\) is a parallelogram. - \(EFCD\) is a rectangle. - \(AL \perp DC\) (meaning \(AL\) is perpendicular to \(DC\)). ### To Prove: ...
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