### Home > CC3 > Chapter 9 > Lesson 9.1.1 > Problem 9-8

9-8.

### Missing problem for Book CC3 => Chapter Ch9 => Lesson 9.1.1 => Problem 9-8

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Angle 1 and angle 2 are alternate interior angles.

When the lines are parallel, alternate interior angles have equal measures.

Disregard your calculations for angle measure from part (a).

3*x* − 18 = 74

3*x* = 92

*x* = 30.6°

Since the lines are parallel, angles 1 and 2 have equal measure.

*x* = 17°, *m*∠2 = 42°