### Home > MC1 > Chapter 9 > Lesson 9.2.3 > Problem 9-82

9-82.

*w + w + w *+ 4 = 40

3*w* + 4 = 40

3*w* = 36

*w* = 12

Remember that the angles of a triangle add up to 180 degrees.

9-82.

*w + w + w *+ 4 = 40

3*w* + 4 = 40

3*w* = 36

*w* = 12

Remember that the angles of a triangle add up to 180 degrees.