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

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

Answer 2

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