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Question-41787




Question Number 41787 by Tawa1 last updated on 12/Aug/18
Answered by tanmay.chaudhury50@gmail.com last updated on 12/Aug/18
grey area=ya +(1/2)(x−y)a  =((2ya+xa−ya)/2)  =(1/2)(x+y)a
$${grey}\:{area}={ya}\:+\frac{\mathrm{1}}{\mathrm{2}}\left({x}−{y}\right){a} \\ $$$$=\frac{\mathrm{2}{ya}+{xa}−{ya}}{\mathrm{2}} \\ $$$$=\frac{\mathrm{1}}{\mathrm{2}}\left({x}+{y}\right){a} \\ $$

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