Question

The interior angles formed by the sides of a quadrilateral have measures that sum to 360°.

What is the value of x?

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x =

Answer 1

x = 59

Explanation:

Add up the angle measures, and solve for x.

x° +x° = (2x+3)° +(2x+3)° = 360°

6x+6 = 360 . . . . . collect terms, divide by °

x + 1 = 60 . . . . . . . divide by 6

x = 59 . . . . . . . . . . subtract 1