Topic: Geometric ConstructionsStd: IX

H.G.M. Azam College of Education

• A line segment is a part of a line that is bounded by two distinct end points.

What is a line segment?

. .A B

• Part of the circumference (edge) of a circle

What is an Arc?

..

A

B

• It is the relationship between two lines which meet at a right angle (90 degrees).

What is a perpendicular?

. .A B

.

90.

C

O

• The perpendicular bisector is a line that divides a line segment into two equal parts.

• Each point on the perpendicular bisector is the same distance from each of the endpoints of the original line segment.

What is a perpendicular bisector?

. .OAB

• Draw line L and take point P on it. Draw line M perpendicular to line l at pt. p

Example: 1

.p

l

m

A B

• Draw a line segment PQ. Draw perpendicular bisector of the segment.

Example: 2

90

p q

A

B

Activity

• Draw a line segment PQ. Draw two arcs and bisect it perpendicularly and name them