229 + m<x = 360

Question

The sum of the interior angles of a quadrilateral is 360 degrees.

Subtraction property the equality

A quadrilateral with opposite angles congruent is parallelogram.

Simplify (Combine like terms)

choose the correct answer and explain why

Answer 1

m = 131

Explanation: By subtracting 229 from both sides of the equation, we get m + x = 131. Since the sum of the interior angles of a quadrilateral is 360 degrees, we can conclude that m = 131.