Three angles of a Quadrilateral are 75°, 90°, 75°. Find the measure of the fourth angle.

Introduction

In this post, you will know the solution of this Quadrilateral question.

Solution

Let the fourth angle be x.

Then, the sum of all angles of Quadrilateral is 360°.

We have, 75° + 90° + 75° + x° = 360°

                                               x° = 120°

Hence,the measure of fourth angle is 120°.

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