Question

the three angle of a quadrilateral are 60,70,and 120.find the fourth angle is

Answer 1

YOUR ANSWER
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Let the fourth angle be x.
(60+70+120+x)°=360°
(250+x)°=360°
x=(360-250)°
x=110°
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Answer 2

let the fourth Angle be x
60+70+120+x=360
250+x=360
x=110