Question

If three angles of a quadrilateral are each equal to 80 then find the fourth angle

Answer 1

Answer:

The fourth angle will be 120°

Step-by-step explanation:

let the angles be A,B,C,D

angleA = angleB = angleC = 80°

angleA + angleB + angleC + angleD = 360°

80° + 80° + 80° + angleD = 360°

240° + angleD = 360°

angleD = 120°

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Answer 2

Let the angles be A,B,C,D.

angleA = angle B = angleC = 80

angleA + angleB + angleC + angleD = 360

80 + 80 + 80+ angleD = 360

240 + angleD = 360

angleD = 120

I hope my answer is correct.

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