Question

The sum of the angle measures of a quadrilateral is 360degrees. Write and solve an equation to find the value of X

Answer 1

x = 40

Explanation:

The shape adds up to 360 degrees, therefore we just have to find the one missing angle.

We are given 100, 100, and 120.

100+100+120 = 320

now it is just, 320 + x = 360

subtract 320 from both sides and you will get x = 40.

Answer 2

Answer: x=40 degrees

Explanation:

100+120+100=360-x

320=360-x

x=40 degrees