Post on 01-Mar-2022
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Circle in daily life Circle in music Circle in sports Circle Centre Circumference Circular region Radius Diameter Chord Arc Semicircle Segments of a circle Crossword
Many musical instruments have a circular surface. For example:
Bingo Drum Tabla
Snare Drum Bass Drum BACK
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.
BACK
This fixed point (equidistant) inside a circle is called centre.
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. O Centre
A circle
A circle has one and only one centre.
BACK
A circle divides a plane into three parts.
2. Interior of a circle
3. Exterior of a circle
A plane
O Centre
The interior of a circle together with its circumference is called the circular region.
1. The circle
BACK
A line segment that joins any point on the circle to its centre is called a radius.
M A point on the circle
Centre O
Radii ( plural of radius) of a circle are equal in length.
Infinite number of radius can be drawn in a circle.
Centre
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BACK
A line segment that joins any two points on the circle and passes through its centre is called a diameter.
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A circle O Centre
A circle
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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.
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Q Centre
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The length of the diameter of a circle is twice the length of its radius. d=2r and r=(1/2)·d
Radius OM Centre
M O
N Radius ON
Diameter MN
Diameter MN = Radius OM + Radius ON Radius OM = Radius ON
BACK
A line segment that joins any two points on the circle is called a chord.
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B A
A is a point on the circle
B is another point on the circle
O Centre
L K
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.
X Naming an arc
Arc KXL
O Centre
L K
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An arc divides the circle into two parts: the smaller arc is called the minor arc, the larger one is called the major arc.
Minor Arc KXL
Major Arc KYL
Half of a circle is called a semicircle.
Centre O
Diameter D E
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A semicircle is also an arc of the circle.
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Arc DSE
Semicircle DRE
Semicircle DSE
Arc DRE
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Down 1. The distance between any two points on the circumference of the circle. 2. The distance around the circle. 3. The distance from the centre of the circle to a point on the circle.
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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.
4 D A M T E E
5 I R L E
6 C E N T E
H R O D 7