Please help!!! explain why a + b = d

Alfero Chingono asked Jun 20, 2023

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Please help!!!

explain why a + b = d

Alfero Chingono asked Jun 20, 2023

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16 votes

a + b + c = 180 ( sum of angles in a triangle )
c + d = 180 ( adjacent angles are
supplementary ), thus
a +b+c=c+ dsubtract c from both sides )
a+b=d

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