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TOPIC : CIRCLE
S
Centre
M
P
ED
Q
G
O
F
Diameter DE
Circle in daily life
Circle in sports
Circle
Centre
Chord
Radius
Diameter
Crossword
A circle
Five rings in the logo of Olympic games
A circle
A circle can be drawn with the help of a circular object.
For example: A circle drawn with the help of a coin.
A circle is a closed curve in a plane.
This fixed point (equidistant)
inside a circle is
A circle is a closed curve
A circle has only one
centreisting of all points
O is the centre point inside
it.
OCentre
re.
A line segment that joins any point on the circle to its centre
is called a radius.
M
A point on the circle
CentreO
(Contd…)
OM is the radius
Radii ( plural of radius) of a circle are equal in length.
Infinite number of radii can be drawn in a circle.
Centre
K
O
L
M
N
ON=OM=OL=OK
A line segment that joins any two points on the circle and
passes through its centre is called a diameter.
A
B
AB is the diameter
O Centre
(Contd…)
AB=MN
O
M
Infinite number of diameters can be drawn in a circle.
As the radii of a circle are equal in length, its diameters too
are equal in length.
B
Q
(Contd…)
Centre
P
A
N
A line segment that joins any two points on the circle is
called a chord.
O
BA
A is a point on the circle
B is another point on the circle
AB is the chord
C2
C
UM
F
E
R
N
C
E
A
E
I
Down
1. A portion of the circumference of a
circle.
2. The distance around the circle.
3. The distance from the centre of the
circle to a point on the circle.
R
D
IU
S
R
1
C
3R
A
Across:4. The line segment that joins
any two points on the circle
and passes through its
centre.
5. A closed curve in a plane.
6. All points on the circle are
equidistant from this point.
7. A line segment that joins any
two points on a circle.
4D A M TE E
5 I R L E
6C E N T E
H RO D7
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