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The area of a parallelogram is the produ...

The area of a parallelogram is the product of its base and the corresponding altitude. GIVEN : A parallelogram `A B C D` in which `A B` is the base and `A L` the corresponding altitude. TO PROVE : `a r(^(gm)A B C D)=A BxA L` CONSTRUCTION : Complete the rectangle `A L M B` by drawing `B M_|_C Ddot`

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