Question

SOLVE THE FOLLOWING.
(1) If three angles of quadrilateral are 120, 60, 100. Find the fourth angle.​

Answer 1

Answer:

80°

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Answer 2

Answer:

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Step-by-step explanation:

sum of all angles in a quadrilateral is 360 degree

120 degree + 60 degree + 100 degree + X degree = 360 degree

280 degree + X degree = 360 degree

X degree = 360 degree - 280 degree

X degree = 80 degree