Question

ABCD is parallelogram
10
PO​

Answer 1

Answer:

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Step-by-step explanation:

Answer 2

Answer:

ANSWER

Let ∠A be 2x

Let ∠D be 2y

Since AB∥DC , sum of angles on same side of the transversal AD will be 180o

=>2x+2y=180o

x+y=90o

After bisection of angles A and D, we get ∠1=x and ∠2=y as per the given figure.

Now in △AOD, we have

x+y+∠AOD=180o

90o+∠AOD=180o

=>∠AOD=90o