Chapter 4: Parallel Lines

Question 0

Lines, segments, rays, or points which lie in the same plane are said to be

Answer 0

coplanar

Question 1

Parallel lines are

Answer 1

lines that lie in the same plane (coplanar) and that never intersect

Question 2

A transversal is

Answer 2

a line that intersects two or more lines in different points

Question 3

Postulate 6: If two parallel lines are cut by a transversal, then

Answer 3

their alternate interior angles are congruent (equal)

Question 4

Theorem 9: If two parallel lines are cut (crossed) by a transversal, then

Answer 4

their corresponding angles are congruent (equal)

Question 5

Theorem 10: If the two angles in a linear pair have equal measures (are congruent), then

Answer 5

each is a right angle

Question 6

Theorem 11: If two parallel lines are cut (crossed) by a transversal, then

Answer 6

their alternate exterior angles are congruent (equal)

Question 7

Theorem 12: If two parallel lines are cut (crossed) by a transversal, then

Answer 7

interior angles on the same side of the transversal are supplementary

Question 8

Postulate 7: If two lines form congruent alternate interior angles with a transversal, then

Answer 8

the lines are parallel

Question 9

Theorem 13: If two lines form congruent corresponding angles with a transversal, then

Answer 9

the lines are parallel

Question 10

Theorem 14: If two lines form congruent alternate exterior angles with a transversal, then

Answer 10

the lines are parallel

Question 11

Theorem 15: If two lines form supplementary interior angles on the same side of a transversal, then

Answer 11

the lines are parallel