Question

the three angles of a quadrilateral are 75°,80°,120°.find the measure of fourth angle​

Answer 1

let the fourth Angele=x

75°+80°+120°+x=360°

275°+x=360°

x=360°-275°

x=85°

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Answer 2

☆ Solution ☆

Given :-

• The three angles of a quadrilateral are 75°,80°,120.

To Find :-

• The measure of fourth angle.

Step-by-Step-Explaination

As we know that

Sum of all angle = 360°

So,

Let the fourth angle be x°

75° + 80° + 120° + x = 360°

275° + x = 360°

x = 360° - 275°

x = 85°

Hence,

The measures of fourth angle = 85°.