Mathematics
Circles
Grade
INTRODUCTION
Objective
: To identify some concepts of the
circle such as centre, chord,
diameter and radius.
Target group
: Secondary level, Grade- 6
Duration/Mode : 45 minutes/Student-centred.
CONTENTS
Circles
Diameter
Chord
P
Concepts on Circle
Quiz
Q
Circles
A circle is the set of all points in a plane that are
at a given distance from a given point. The given
point P is called the center of the circle and the
given distance is called the radius of the circle.
P
Center
Diameter
A diameter is a line segment that connects
two points on the circle and goes through the
centre of the circle.
diameter
A
P
B
Central Angle
A central angle is an angle whose vertex is
the center of the circle..
A
P
Central
Angle
B
Arc
An arc is part of a circle connecting two
points of the circle.
A
Arc
P
B
Sector
A sector is a region contained by two radii
and an arc.
A
Sector
P
B
Chord
A chord of a circle is a segment whose end points
lie on the circle.
chord
C
D
Concepts on circle
Chord
C
Central
Angle
Diameter
D
P
A
B
Sector
Arc
Q
Center
Radius
Quiz
Choose the correct answer.
1. The longest chord of a circle is a
A.
diameter
B.
radius
C.
segment
Quiz
Choose the correct answer.
2. The distance between the center and a point on the
circle is called
A. diameter
B. chord
C. radius
Quiz
Choose the correct answer.
3. The part of a circle connecting two points of the circle is
the
A. central angle
B. sector
C. arc
Worksheet
Click on each icon to get the activity worksheet.
The following URL is the starting place, feel free to search the Internet
for other related information.
http://www.math.com/school/subject3/lessons/S3U1L6GL.html
THANK YOU
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