Chapter 1

Question 0

Line

Answer 0

Has one dimension

Extends infinitely in two directions

Question 1

Point

Answer 1

Has no dimension, just a place in space
Represented as a dot
Named with a capital letter

Question 2

Plane

Answer 2

Has two dimensions
Extends infinitely in all directions
Represented with a wall or floor like shape
Named by using any 3 points in the plane or script uppercase

Question 3

Collinear

Answer 3

Points on the same line
Any two points are collinear
A line can be drawn through them
To see that 3 points are collinear there has to be a line drawn through them
Because it is not possible to draw a line through any 3 points but it is possible for 2 points.

Question 4

Coplanar

Answer 4

Points on the same plane
Any three points are coplanar
A plane can be drawn through them
If there is more than 3 points there must be a plane drawn through them

Question 5

Line Segment

Answer 5

Has two endpoints

Named using the two endpoints

Question 6

Ray

Answer 6

Has one endpoint, goes on forever in one direction

Named using one endpoint and one point on the line

Question 7

Opposite Rays

Answer 7

2 rays that share an endpoint, forming a line

Question 8

Intersection

Answer 8

When 2 or more figures share a line or point
Lines intersect at a point
Planes intersect at a line
Planes go forever in one direction so the lines have to go forever in one direction

Question 9

Segment Addition Postulate

Answer 9

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

The parts of a segment add up to a segment

Question 10

Congruent Segments

Answer 10

Segments with the same length

Question 11

Midpoint

Answer 11

The point that divides the line segment into congruent parts

Question 12

Segment Bisector

Answer 12

A point, line, ray, segment or plane that that crosses a segment through its midpoint.

Question 13

Midpoint Formula

Answer 13

Average the 2 numbers to find the midpoint for 2 points on a number line

Question 14

Angle

Answer 14

Created when 2 rays have the same endpoint; the amount of rotation from on ray to another

Question 15

Vertex

Answer 15

The point where 2 rays meet; the “middle point”

Question 16

Sides

Answer 16

The two rays making up the angle

Question 17

Acute angle

Answer 17

Between 0 and 90 degrees

Question 18

Right Angle

Answer 18

90 degrees

Question 19

Obtuse Angle

Answer 19

Between 90 and 180 degrees

Question 20

Straight Angle

Answer 20

180 degrees

Question 21

Angle Addition Postulate

Answer 21

Adding the smaller angles to get the bigger angle

Question 22

Angle Bisector

Answer 22

A ray that divides an angle into 2 congruent angles

Question 23

Adjacent Angles

Answer 23

Two angles that share a vertex and side, but no point

Question 24

Complimentary Angles

Answer 24

Two angles that add up to 90 degrees

Question 25

Supplementary Angles

Answer 25

Two angles that add up to 180 degrees

Question 26

Linear Pair

Answer 26

Two angles that are adjacent and supplementary (form a straight line)

Question 27

Vertical angles

Answer 27

Two angles whose sides make straight lines, but only cross at the vertex

Question 28

Polygon

Answer 28

A closed plane figure | The vertices, where the lines connect, have only 2 sides

Question 29

Concave polygon

Answer 29

When sides are extended, at least one enters the polygons

Question 30

Convex Polygon

Answer 30

When sides extended and none enters the shape

Question 31

Equilateral

Answer 31

Polygons with congruent sides

Question 32

Equiangular

Answer 32

Polygons with congruent angles

Question 33

Regular

Answer 33

All sides and angles congruent