Lesson 17.1

Lines and Rays

Point Names an exact

point in space. Draw it (see left) Read it: Point A Write it: point A

A

line A straight path that

continues in both directions without end. It has no endpoints.

Draw it: Read it: Line KL Write it: KL

K

L

Line Segment Part of a line. It has

two endpoints and all the points between them. It is the shortest distance between two points.

Draw It: Read It: line

segment KL Write It: KL

K L

Ray A ray is part of a

line that has one endpoint and continues without end in one direction.

Draw It: Read It: Ray KL Write It: KL

K

L

Plane A flat surface of

points that continue without end in all directions. A plane is named by at least three points in the plane.

Draw It: Read It: plane ABC Write It: plane ABC

A

B

C

Draw

Line BCLine segment PQPoint GPlane RSTLine STRay XY

Draw

BYBYBYPoint BPoint YPlane BYU