Question

What is the measure of the missing angle

Answer 1

x = 90°

Explanation:

Angles in a quadrilateral add up to 360°

We are given the following angles : 107°, 72° and 91°

Wee need to find x so,

x + 107° + 72° + 91° = 360°

( Simplify )

x + 270° = 360°

( Minus 270° from both sides to isolate x )

x = 90°

Answer 2

The sum of the angles of any quadrilateral is 360 degrees. This means that you can make a formula like the one bellow and solve for x:

72 + 107 + x + 91 = 360

270 + x = 360

(270 - 270) + x = 360 - 270

x = 90

Hope this helped!

~Just a girl in love with Shawn Mendes