### Home > GC > Chapter 8 > Lesson 8.3.2 > Problem 8-98

8-98.

**justifies** each calculation. Remember that each part is a separate problem.

If

and, write an equation and solve for.Note that

and are alternate interior angles.

What is true about alternate interior angles?If

and, write an equation and solve for. Then find the measure of. Note that

is congruent to and that are supplementary angles.

Refer to the Math Notes box in Lesson 2.1.4 if you need help justifying why.