Question

quadrilateral are
If three angles of a
70°, 80° and 90°, find the measure of
the fourth angle.​

Answer 1

Answer:

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Answer 2

angle of quadrilateral is 360°

then, 70°+80°+90°+x = 360°

240°+x = 360°

x = 360° - 240°

x = 120°

than the fourth angle is 120°

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