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4. Look at the given figure and write the name of: Q

(a) Any three points. (b) Any two line segments. P
R
(c) Any three rays. (d) A line.

5. Measure the length of the following line segments using a ruler. X Y

(a) C D

(b) P Q

(c) R S

(d) T U

6. Draw the following line segments of given lengths.

(a) AB = 4 cm (b) CD = 8 cm (c) EF = 10 cm

tyPes of Lines

A straight line can be drawn in the following ways.

(a) a horizontal line

(b) a vertical line

(c) a slanting line Horizontal line Vertical line Slanting line

A pair of lines lying on a plane either meet at a Be Aware

point or never meet each other. On this basis, A plane can be
they are known as intersecting and parallel lines. considered as a
flat surface that
Intersecting Lines: A pair of lines which meet or extends indefinitely
intersect at one point are called intersecting in all directions. The
sheet of paper is a part of a plane.
lines.

The point at which the lines meet or intersect is called the point of intersection. l m
In the given figure, O is the point of intersection of lines l and m. O

Parallel Lines: A pair of lines that can never meet even if extended in both
directions endlessly are called parallel lines.
p
In the given figure, p and q are parallel lines. q

Think Tank Logical Thinking
Where do you see parallel lines around you? Write in the given blank space.
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