Question

Three angles of a quadrilateral are 100°, 90°,92° respectively.Find the value of fourth angle

Answer 1

A +B +C +D = 360. (Sum of all sides of a quadrilateral is 360)

100+92+90+D=360

D =360-282

D=78

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Answer 2

fourth angle =360-(100+90+92)
=360-282
=72