2. S
Circle in daily life
Q
Circle in music
PQ
ord
Ch
Circle in sports
P
Circle
Diameter DE
Centre
D
E
Circumference
O
M
O
Centre
Circular region
s
u
di
Radius
Ra
F
Diameter
M
Chord
RE
rc
Arc
G
A
Semicircle
Segments of a circle
Crossword
6. A circle is a closed curve in a plane.
A circle can be drawn with the help of a circular object.
For example: A circle drawn with the help of a coin.
BACK
7. A circle is a closed curve
consisting of all points
in a plane which are at the
same distance (equidistant)
from a fixed point inside it.
Centre O
This fixed point (equidistant)
inside a circle is called
centre.
A circle has one and only
one centre.
A circle
9. A circle divides a plane into three parts.
3. Exterior of a circle
Centre
O
2. Interior of a circle
A plane
1. The circle
The interior of a circle together with its circumference
is called the circular region.
10. us
di
Ra
O Centre
M
A point on the circle
A line segment that joins any point on the circle to its centre
is called a radius.
(Contd…)
12. A
O Centre
Diameter AB
A circle
B
A line segment that joins any two points on the circle and
passes through its centre is called a diameter.
(Contd…)
14. (Contd…)
M
Diameter MN
Radius OM
O
Radius ON
N
Centre
Radius OM = Radius ON
Diameter MN = Radius OM + Radius ON
The length of the diameter of a circle is twice the length of its
radius.
15. A is a point on the
circle
A
Chord
A line segment
that joins
point A and B
B is another point
on the circle
B
O
A line segment that joins any two points on the circle is
called a chord.
19. K
L
O
Centre
An arc is the distance between any two points on the
circumference of a circle.
(Contd…)
20. Naming an arc
X
K
Arc KXL
L
O
Centre
An arc is named by three points, of which two are the end
points of the arc and the third one lies in between them.
(Contd…)
21. Minor Arc KXL
K
X
L
O
Centre
Major Arc KYL
Y
An arc divides the circle into two parts: the smaller arc is
called the minor arc, the larger one is called the major arc.
(Contd…)
24. Semicircle DSE
Semicircular region
D
O Diameter
Centre
E
Semicircular region
Semicircle DRE
The diameter of a circle divides it into
2 semicircular regions.
BACK
25. S
D
Minor segment of a circle
E
Chord DE
Centre
O
Major segment of a circle
R
A chord divides the circular region into 2 parts, each of
which is called a segment of the circle.
(Contd…)
26. P
Minor arc DPE
E
D
Chord DE
Centre
Minor segment of
the circle
O
Major segment of the
circle
Major arc DQE
Q
The part of the circular region enclosed by a minor arc and
major
the chord is called a minor segment.centre of the
major
Minor segment does not the centre of the circle. circle.
Major
contains contain the
BACK
33. 2C
1A
4D I
R
R
5C
I
R
C
A
M
E
T
E 3R
A
L
D
E
U
I
M
U
F
S
E
6C E
N
T
R
E
N
E
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.
Down
1. The distance between any two
points on the circumference of the
circle.
2. The distance around the circle.
E
7C H
Across:
O
R
D 3. The distance from the centre of the
circle to a point on the circle.