Question

A quadrilateral has interior angle measures of 65°, 75°, and 121°. What is the measure of the fourth interior angle in the quadrilateral?

Answer 1

The measure of the fourth interior angle in the quadrilateral is 145

Answer 2

Sum of  quadrilateral is 360
so 360 - (65 + 75 + 121)
=360 - 261
= 99

answer: 99  is the measure of the fourth interior angle in the quadrilateral