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sarah110128
 2 years ago
Best ResponseYou've already chosen the best response.1dw:1358143521967:dw

sarah110128
 2 years ago
Best ResponseYou've already chosen the best response.1side ab, bc, cd, de are equal

matricked
 2 years ago
Best ResponseYou've already chosen the best response.1is the triangle a rtangled one at D

matricked
 2 years ago
Best ResponseYou've already chosen the best response.1let 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

personperson99
 2 years ago
Best ResponseYou've already chosen the best response.0could have just exterior angles

sarah110128
 2 years ago
Best ResponseYou've already chosen the best response.1Thank Youu! It was helpful :)

matricked
 2 years ago
Best ResponseYou've already chosen the best response.1the 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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