1. Angles and Parallel Lines
COURSE 3 LESSON 8-2
Angles and Parallel Lines
In the diagram below, m 5 = 80º, m 6 = 80º, and m 7 = 80º. Explain why p and q are parallel and why s and t are parallel.
p || q because 5 and 7 are congruent alternate interior angles.
s || t because 6 and 7 are congruent corresponding angles.
8-2

2. Angles and Parallel Lines
COURSE 3 LESSON 8-2
Use the diagram to answer the questions.
1. Classify 4 and 7 as 2. Classify 2 and 8 as
alternate interior angles, alternate interior angles,
corresponding angles, corresponding angles,
or neither. or neither.
3. If a || b and m 8 = 80°, 4. Suppose m 5 = 100° and
find m m 3 = 100°. What can you
conclude about line a and
line b?
neither
alternate interior angles
80°
a || b
8-2