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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