if DEllQR ,AP snd BD are the bisector of – InterviewSolution

1.

if DEllQR ,AP snd BD are the bisector of

Answer»

Let angle EAP = angle BAP = x (AP bisector)Let angle RBP = angle PBA = y BP is bisector

angle EAB + angle ABR = 180 degrees as AE and BR are parallel

2 * x + 2 * y = 180 deg x + y = 90

angle APB = 180 - x - y in trianle APBangle APB = 180 - 90 = 90 deg

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