Question

The three angles of a quadrilateral are 76°, 54° and 108°. Find the
measure fourth angle.

Answer 1

In a quadrilateral, sum of angles is 360 deg.

First we find the sum of the three angles: 76+54+108  = 238

Now, 360-238 = 122 deg

So the fourth angle is 122

Hope this helped!

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