1.2 Points, Lines, And Planes

Question 1

Point

Answer 1

Indicates a location and has no size

Represent a point by a dot and name it with a capital letter

Question 2

Line

Answer 2

Represented by a straight path that goes in opposite directions with out end, contains infinitely many points

Question 3

Plane

Answer 3

Represented by a flat surface that extends without end, contains infinitely many points

Question 4

Collinear points

Answer 4

Points that lie on the same line

Question 5

Coplanar

Answer 5

Points and lines that lie on the same plane

Question 6

Space

Answer 6

The set of all points in 3D

Question 7

Segment

Answer 7

Part of a line that consists of two endpoints and all points between them

Name it by it’s two endpoints

Question 8

Ray

Answer 8

Part of a line that consists of one endpoint and all the points to one side of it

Name it by it’s end point and another point on the ray
Go in order of endpoint then ray point

Question 9

Opposite rays

Answer 9

To rays that share the same point and form a line

You can name opposite rays by the shared in point and any other point on each ray

Question 10

Postulate or axiom

Answer 10

An accepted statement of fact

Question 11

Intersection

Answer 11

The set of points two figures have in common