Grade 4 - Progress in Mathematics

Points, Lines, and Line Segments

10-1

A plane is a flat surface that extends

indefinitely in all directions. The

surface of a table or a sheet of

paper are both parts of planes.

A point names a location in space.

A,B, and Xare points in a plane.

A B X

Read: point A, point B, point X

Write: A, B, X

A line is straight. It is a set of points

that extends forever in opposite directions.

Read: line GH orline HG

Write: GH



orHG



A line segment is the part of a line

between two endpoints.

Read: line segment DEorline segment ED

Write: D
E
orE

D

D E

G H

Line segment GH

is part of line GH.

Identify each as a point, line, or line segment. Use symbols.

1. 
   
   
   
   2. 
      
      
      
      3. 
         
         
         
         4. 
            
         
         
         
         
      
      
      
      
   
   
   
   


2. H 6. 7. 8.
   J

Z

Y

L QP

F G

W

V

N

M

R

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