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Answer Key
Lesson 3.1
Study Guide
1. skew 2. parallel 3. parallel
@##$, EH
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4. perpendicular 5. AD
@##$ 8. @##$
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6. plane ABE 7. FG
AE, DH
9. alternate interior 10. corresponding
11. alternate exterior 12. consecutive interior
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Answer Key
Lesson 3.2
Study Guide
1. Using the Vertical Angles Congruence Theorem, m∠ 8 5 658. By the Corresponding Angles Postulate,
m∠ 4 5 658. Because ∠ 8 and ∠ 6 are corresponding angles, by the Corresponding Angles Postulate, you
know that m∠ 6 5 658.
2. Using the Vertical Angles Congruence Theorem, m∠ 3 5 1158. By the Corresponding Angles Postulate,
m∠ 7 5 1158. Because ∠ 3 and ∠ 1 are corresponding angles, by the Corresponding Angles Postulate, you
know that m∠ 1 5 1158.
3. 68 4. 25 5. 12 6. 10
7. 10 8. 5 9. 12 10. 16
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Lesson 3.3
Study Guide
1. 18
2. Yes; the angle that corresponds with 708 has a measure of 708 because it is a linear pair with the angle
that measures 1108.
3. 11 4. 8 5. 12
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Study Guide
3
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Study Guide
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Answer Key
Lesson 3.6
Study Guide
1. 45 2. 90 3. 30 4. about 3.5 units
5. about 2.1 units
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