Question

the three angle of a quadrilateral are 80 70 and 120 the fourth angle is ​

Answer 1

Answer:

So answer is

80 + 70 + 120 + ? = 360

270 + ? = 360

? = 360 - 270

? = 90

answer is 90

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Answer 2

Answer:

The sum of angles of all angles in quadrilateral is 360

So,

80+70+120+x = 360°

270° +x = 360

X = 90°