## 1 The measure of three angles of quadrilateral are 60°, 70° and 80°. Find the measure of the fourth angle of the quadrilateral.

Question

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## Answers ( )

Answer:let 4th angle=x

60 +70+80+x=360(sum of angle of all angle of quad is 360

210+x=360

x=360-210

x=150

Answer:Sum of all angles of any quadrilateral is 360°

So,

let the missing angle be x

60+70+80+x=360°

210+x=360

x=360-210

x=150°

The measure of the fourth angle of the qquadrilateral is 150°

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