Question

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

the three nubers are 100 100 120

Answer 1

Answer:

x = 20

Step-by-step explanation:

360 = 100 + 100 + 120 + x

360 = 340 + x

x = 360 - 340

x = 20