Question

Find the value of x.

Answer 1

x = 110

Step-by-step explanation

The sum of the interior angles of a quadrilateral = 360°

Sum the given angles and equate to 360

82 + 40 + 128 + x = 360

250 + x = 360 ( subtract 250 from both sides )

x = 110

Answer 2

x=110°

Explanation:

Sum of angles in a quadrilateral = 360°

360° - 128° - 40° - 82° = 110°