Question

For cyclic quadrilateral abcd, a-c=20. Then find a

Answer 1

Answer:

Step-by-step explanation:

A-c = 20 ......................(1) (given )

A+c = 180 .........................(2) (opp angles of cyclic quadilateral are supplementar)

On adding (1) and (2)

A-c +a+ c = 200

2a = 200 (-c and c got cancelled)

A = 100 degree

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