Question

The measures of three angles of a quadrilateral are 60°, 70° and80degree
respectively, then find the measure of the fourth angle of the quadrilater.​

Answer 1

Step-by-step explanation:

let the fourth angle be x

=> x+60+70+80=360°

=>x+210°=360°

=>x= 360°-210°

=>x= 150°

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