Question

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

Answer 1

ANSWER :-

Sum of all the four angles of a quadrilateral is 360°.

Let the unknown angle be x°.

$76+54+108+x=360 \\ 238+x=360 \\ x=122$

The fourth angle measures 122°.

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