The document defines key geometric terms including point, line, plane, line segment, and ray. It provides examples for each term. A point is an exact location named with a capital letter. A line is a straight path extending indefinitely in two directions named using two points on the line. A plane is a flat surface extending indefinitely in all directions named using three non-collinear points. A line segment has two endpoints and all points between them, named using the endpoints. A ray has one endpoint and extends indefinitely in one direction from that point, named using the endpoint and another point on the ray.

1. Name ______________________________________ Date _________________
Mrs. Labuski & Mrs. Rooney Period ___________ Les 7-1Points, Lines, Planes
VOCABULARY DEFINTION EXAMPLE
Is an exact location •P
Point
A point is named by a capital letter Point P
Is a straight path that extends without • •
end on opposite directions. A B
Line line AB, AB
A line is named by two points on the
line. line BA, BA
•M
A flat surface that extends without end •N
in all directions. •L
Plane
A plane is named by three points on
the plane that are not on the same line. plane LMN
plane MLN
plane NLM
Is made of two endpoints and all the
points between the endpoints. X Y
Line Segment
A line segment is named by its line segment XY, XY
endpoints. line segment YX, YX
Has one endpoint. From the endpoint,
the ray extends without end in one
•
Ray direction only.
J K
A ray is named by its endpoint first
ray JK, JK
followed by another point on the ray.

2. C and D
CA CD AB
BCD
CA BD AB
There are other
possible answers.

3. Name ______________________________________ Date _________________
Mrs. Labuski & Mrs. Rooney Period ___________ Les 7-1Points, Lines, Planes
VOCABULARY DEFINTION EXAMPLE
•P
Point
Point P
• •
A B
Line line AB, AB
line BA, BA
•M
•N
•L
Plane
plane LMN
plane MLN
plane NLM
X Y
Line Segment
line segment XY, XY
line segment YX, YX
•
Ray
J K
ray JK, JK