Question

The three angles of a quadrilateral are 60 degrees , 80 degrees and 120 degrees . Find the fourth angle?

Answer 1

Given :- angles of quadrilateral = 60,80and 120

We know that sum of all angles of a quadrilateral is 360 degrees.

$60 + 80 + 120 + x = 360 \\ x = 360 - 260 \\ x = 100$

Hence the fourth angle of the quadrilateral is 100 degree

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