1) The document defines and provides examples of different types of lines and angles. It discusses lines, line segments, rays, intersecting lines, parallel lines, and various angle types such as adjacent angles, vertical angles, corresponding angles, and interior and exterior angles. 2) Illustrations and notations are provided for each term to demonstrate their properties and relationships. 3) Real-life examples are given for some concepts, such as cars parked in a straight line for a line and window panes for line segments.

1. Prepared by:
SHRITI GOYAL
IX – E
Roll no. 33

2.  An exact location
 It has no size, only position

3. Definition: When three or more points lie on a straight
line.
Illustration:
Notation: ABCD is a line.
Real life example: Cars parked in a straight line.

4. Definition: A line:
o is straight,
o has no thickness, and
o extends in both directions without end.
Illustration: A B
Notation: AB is a line. It can be extended to any
length.

5. Definition:
Illustration: A B
Notation: AB is a line segment with end points A
and B.
Real life examples: window panes are
surrounded by line segments all around

6. Definition: A line with a start point but no end
point.
Illustration:
A
Notation: A is the starting point but there is no
ending point.
Real life examples: A torch radiating light.

8. Definition: lines that intersect to form right
angles. m
Illustration:
n
Notation: m n
Key fact: Four right angles are
formed.

9. Real

10. Definition: A line that intersects two lines at
different points. t
Illustrations: m
n
Real life example:
Window pane

11.  It is a rotation of a line having starting but no
ending points.
Angles can be of many of many types::
 Basic angles
 Adjacent angles

13. Definition: Two angles are Adjacent when they
have a common side and a common vertex and
don't overlap. A
Illustration: B
D C
Notation: ADB is adjacent to BDC
> as they have a common vertex (D)
> and a common line (BD)

14. Defination: Two angles which are opposite to one
another.
Illustration: 1 2
3 4
5 6
7 8
Notation: Accordance to angle >>> 2 = 3
1 = 4
6 = 7
5 = 8

15. Definition: Two lines that form a line.
Illustration:
1 2
3 4
5 6
7 8
Notation: Accordance to angles >>> 1 + 2 = 180
3 + 4 = 180
5 + 6 = 180
7 + 8 = 180

16. Definition: Two angles that occupy corresponding
position.
Illustration: 1 2
3 4
5 6
7 8
Notation: 1 = 5
2 = 6
3 = 7
4 = 8

17. Definition: Two angles that lie between parallel
lines on opposite sides of the transversal.
Illustration:
1 2
3 4
Notation: 1 = 4
2 = 3

18. Definition: Two angles that lie outside the parallel
lines on opposite sides of the transversal.
Illustration:
1 2
3 4
Notation: 1 = 4
2 = 3

19. Definition: Two angles that lie inside the parallel
lines on the same sides of the transversal.
Illustration:
1 2
3 4
Notation: 1 + 4 = 180
2 + 3 = 180