Question

A quadrilateral has angles that measure 90°, 46°, and 120°. What is the measure of the fourth angle?

Answer 1

we know that

The sum of the internal angles of a quadrilateral is equal to 360 degrees
so
Let
x--------> the measure of the fourth angle

90+46+120+x=360
x=360-(90+46+120)
x=104 degrees

the answer is
the measure of the fourth angle is 104 degrees