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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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