Chapter 2

Question 1

Midpoint

Answer 1

The point that divides the segment into two congruent segments.

Question 2

Point

Answer 2

A dot that represents a location in space

Question 3

Line

Answer 3

A straight, continuous arrangement of infinitely many points extending infinitely in both directions (infinite length buy no thickness).

Question 4

Plane

Answer 4

A flat surface that extends infinitely in all directions (infinite length and width but no thickness).

Question 5

Line Segment

Answer 5

Consists of endpoints A and B and all points on the line that lie between A and B.

Question 6

Ray

Answer 6

Consists of the initial point A and all point on the line AB that lie on the same side of A as B lies.

Question 7

Opposite rays

Answer 7

Two rays on the same line that share an initial point and extend in opposite directions.

Question 8

Collinear

Answer 8

Points, segments, or rays that lie on the same line.

Question 9

Noncollinear

Answer 9

Points, segments, or rays that do not lie on the same line.

Question 10

Length of a line segment

Answer 10

Distance between the two endpoints.

Question 11

Angle

Answer 11

Two different rays with the same initial point.

Question 12

Sides of an Angle

Answer 12

The rays.

Question 13

Vertex of an angle

Answer 13

The shared initial point.

Question 14

Interior of an angle

Answer 14

All points that lie in between the sides of an angle.

Question 15

Exterior of an angle

Answer 15

All the points that do not lie on sides of an angle or its interior.

Question 16

Adjacent Angles

Answer 16

Two angles in a plane that have a common vertex and ray but do not have common interior points.

Question 17

Segment Addition Postulate

Answer 17

If B is between A and C, then AB + BC = AC.

Question 18

Angle Addition Postulate

Answer 18

If B is in the interior of ∠AOC, then m∠AOB + m∠BOC = m∠AOC.

Question 19

Congruent Segments

Answer 19

Two segments are congruent if they have the same length.

Question 20

Congruent Angles

Answer 20

Two angles are congruent if they have the same measure.

Question 21

Segment Bisector

Answer 21

A segment bisector is a segment, ray, line or plane that intersects a segment at its midpoint.

Question 22

Angle Bisector

Answer 22

An angle bisector is a ray that divides the angle into two congruent angles.

Question 23

Perpendicular Lines

Answer 23

Two lines are perpendicular if they intersect to form a right angle.

Question 24

Perpendicular Line and Plane

Answer 24

A line is perpendicular to a plane if it is perpendicular to each line in the plane that intersects it.

Question 25

Vertical Angles

Answer 25

Two angles are vertical if their sides for two pairs of opposite rays

Question 26

Linear Pair

Answer 26

Two adjacent angles are linear pairs no common sides are opposite rays

Question 27

Linear Pair Postulate

Answer 27

If two angles form a linear pair, then they are supplementary

Question 28

Vertical Angles Theorem

Answer 28

If two angles are vertical angles, then they are congruent.