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Step 2. Read the measure on the scale at the other end. The reading gives the length
of the segment. Here, the length of the line segment is 7 cm.

drawing a line Segment

We use a sharp pencil and a ruler to draw a line segment of a given length.

example 2. Draw a line segment of length 5 cm.
Solution.
Step 1. Mark a fine dot with a pencil on a sheet of paper. Name it point A.
A

Step 2. Place the scale along point A, and hold it firmly.

A
FP

Step 3. Draw a line segment of the required length, that is 5 cm.
A

FP

Step 4. Name the other end of the line segment, say point B.

A B

Exercise 7B

1. Write the name and symbol for each of the following:

T V
D C
a. P b. c. d.
S
U

___________ ___________ ___________ ___________

2. Count the number of line segments in these shapes.

a. b. c. d.

___________ ___________ ___________ ___________

118 Mathematics 4