What is circumference of the circle ?
The meaning of circumference is the distance around a circle or any curved geometrical shape.
It is the one-dimensional linear measurement of the boundary across any two-dimensional circular surface.
The formula for the circumference of the circle (C) is
C = 2πr
(where r is the radius of the circle)
Find the circumference of each circle in terms of π.
Problem 1 :
Solution :
The formula for the circumference of the circle is
= 2πr
Here (r) = 5 in
= 2 × π × 5
= 10π in
So, the circumference of the given circle is about 10π in.
Problem 2 :
Solution :
Formula for circumference of circle is
= 2πr
Here (r) = 8 ft
= 2 × π × 8
= 16π ft
So, the circumference of the given circle is about 16π ft.
Problem 3 :
Solution :
Formula for circumference of circle is
= 2πr
Here (r) = 15 yd
= 2 × π × 15
= 30π yd
So, the circumference of the given circle is about 30π yd.
Problem 4 :
Solution :
C = 2πr
Here (r) = 10 yd
= 2 × π × 10
= 20π yd
So, the circumference of the given circle is about 20π yd.
Problem 5 :
Solution :
C = 2πr
Here (r) = 7 in
= 2 × π × 7
= 14π in
So, the circumference of the given circle is about 14π in.
Problem 6 :
Solution :
C = 2πr
Here (r) = 2 ft
= 2 × π × 2
= 4π ft
So, the circumference of the given circle is about 4π ft.
Problem 7 :
Solution :
C = 2πr
Here (r) = 16 ft
= 2 × π × 16
= 32π ft
So, the circumference of the given circle is about 32π ft.
Problem 8 :
Solution :
C = 2πr
Here (r) = 4 yd
= 2 × π × 4
= 8π yd
So, the circumference of the given circle is about 8π yd.
Problem 9 :
Solution :
C = 2πr
Here (r) =12 in
= 2 × π × 12
= 24π in
So, the circumference of the given circle is about 24π in.
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