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anonymous
 4 years ago
prove that a+ b= y for the angles given in the figure.
anonymous
 4 years ago
prove that a+ b= y for the angles given in the figure.

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anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0dw:1358143521967:dw

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0side ab, bc, cd, de are equal

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0is the triangle a rtangled one at D

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0let DE= ab=bc= cd=x tany =1 tana=DE/DA =1/3and tanb=DE/DB=1/2 now tan(a+b) =(1/3 +1/2)/( 1 (1/3)(1/2))= (1/2+1/3)/(11/6) =(5/6)/(5/6)=1 thus tan(a+b)=1 but tany=1 hence tan(a+b)=tany thus a+b=y

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0could have just exterior angles

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0Thank Youu! It was helpful :)

anonymous
 4 years ago
Best ResponseYou've already chosen the best response.0the other way to solve is to complete the rectangle with sides as AD and DE and draw the inner squares and then use elementary geometrical properties
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