Page 114 - Revised Maths Wisdom Class - 3

112 MATHS

Line

When we extend a line segment AB in both directions endlessly, a line is obtained. A line

has no starting and end points and thus has no defi nite length. We denote the line AB no starting and end points and thus has no defi nite length. We denote the line AB
has
as AB.
A B Remember!emember!emember!
R

 A line has no fi xed length and
Ray can be extended to any length.

When we extend a line segment endlessly only in one direction, a ray is obtained. We

denote the ray AB as AB. It has a starting point but no end point.
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A ray, thus, does not have a defi nite length. A B

Curved Line

In the fi gure given below, the points A and B are joined, but not

by a ruler. The line is not a straight line. It is called a curved line. A B

Exercise 8A

M
1 Name the points shown in fi gure. S
N
2 Name the points marked between X and Y on the line segment XY.

X Y
L R S T U
3 Name the line segments in each of the following fi gures.

P Q A D K J

(a) (b) (c) F I

R B C G H

4 Mark two points A and R on your notebook. How many line segments can you
draw passing through both these points?
RIDDLE
5 In the given fi gure name: RIDDLE

(a) Horizontal lines I’m long and straight, never bending or round,
A D In geometry class, I’m known for endless
(b) Vertical lines straight track,

(c) Slanting lines B C Drawn with a ruler, I’m easy to see, What am I?
Can you tell my name?