A line segment is the shortest that connects two given points, but a line has no end points.

The line segment joining the two points A and B can be simple written as AB or the line segment AB.

Length of the line segment AB is equal to the length of the line segment BA.

A line segment can be measured either with a ruler or divider.

Let us look at some examples to understand how to construct a line segment.

**Example 1 :**

Draw a line segment AB = 5.8 cm using a ruler.

**Step 1 : **

Draw a line "l" and mark a point A on it.

**Step 2 : **

Fix a ruler on the line. Fix it in such a way that the zero on the scale and the point "A" coincides.

**Step 3 : **

(i) From A, measure 5.8 cm

(ii) Mark the point as B.

(iii) AB = 5.8 cm is the required segment.

**Example 2 :**

With the help of a ruler and compass, draw a line segment PQ = 2.5 cm

**Step 1 : **

Draw a line "l" and mark a point P on it.

**Step 2 : **

With the help of a compass, measure 2.5 cm as shown in the figure.

**Step 3 : **

(i) Place the sharp edge of the compass at P.

(ii) Then with the pencil, draw a small arc on "l" to cut the line. mark the point as "Q".

(iii) PQ = 2.5 cm is the required line segment.

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