Chapter 1 Vocab

Question 1

Point

Answer 1

A point has no dimensions it is represented by a dot

Question 2

Line

Answer 2

Has one dimension. It is represented by line with two arrowheads, but it extends without end. Through any two points there is exactly one line

Question 3

Plane

Answer 3

A plane has two dimensions. It is represented by a shape that looks like a floor or a wall, but it extends without end. Through any three points not on the
same line there is exactly one plane

Question 4

Defined terms

Answer 4

Terms that can be described using known words

Question 5

Undefined terms

Answer 5

A word that does not have a formal definition but has an agreed meaning

Question 6

Line segment

Answer 6

Part of a line that consists of two points, called endpoints, and all points on the line that are between the endpoints.

Question 7

Ray

Answer 7

Part of alignment consists of a point, called an endpoint, and all points on the line

Question 8

Opposite Rays

Answer 8

To rays on the same line that share a common endpoint

Question 9

Intersection

Answer 9

The set of points the figures have in common

Question 10

What is the intersection of two lines?

Answer 10

A point

Question 11

What is the intersection of two planes?

Answer 11

A line

Question 12

Coordinate

Answer 12

The real number that corresponds to a point on a line

Question 13

Congruent segments

Answer 13

Line segments that have the same length

Question 14

Angle

Answer 14

To rays that share the same endpoint

Question 15

Angle bisector

Answer 15

Hey Ray that divides an angle into two angles that are congruent

Question 16

Linear Pair

Answer 16

Two adjacent angles whose noncommon sides are opposite rays ( form a straight line)

Question 17

Acute angle

Answer 17

An angle with the measure greater than 0° but less than 90°

Question 18

Right angle

Answer 18

An angle with a measure of 90°

Question 19

Obtuse angle

Answer 19

An angle with a measure greater than 90° and less than 180°

Question 20

Straight angle

Answer 20

An angle with a measure of 180°

Question 21

Reflex angle

Answer 21

An angle with the measure greater than 180° and less than 360°

Question 22

Complementary angles

Answer 22

Two angles whose measures add up to 90°

Question 23

Supplementary angles

Answer 23

Two angles whose sum is 180°

Question 24

Adjacent angles

Answer 24

Two angles that share a common vertex and side , but have no common interior points

( next to each other)

Question 25

Vertical Angles

Answer 25

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

Question 26

Polygon

Answer 26

A closed figure that lies in a plane That is formed by three or more line segments and where each side intersects exactly 2 lines

Question 27

Convex

Answer 27

A polygon is convex if no line that contains a side of the polygon enters into the interior of the polygon

Question 28

Concave

Answer 28

A polygon that is not convex

Question 29

Equilateral polygon

Answer 29

All sides are congruent

Question 30

Equiangular polygon

Answer 30

All angles in the interior of the polygon are congruent

Question 31

Regular polygon

Answer 31

A convex polygon that is both equilateral and equiangular