![Circumference and Area of Circles](/circumference_and_area_of_circles/images/circumference_and_area_of_circles_logo.jpg)
Circumference of a Circle
The circumference is the perimeter of a circle. It's the distance around a circle.
![Circumference](/circumference_and_area_of_circles/images/circumference.jpg)
Formula for Circumference of a Circle
Circumference is given by the formula C = πd where π = 3.14 and d is the diameter of the circle.
Circumference is given by the formula C = 2πr where π = 3.14 and r is the radius of the circle.
Find the circumference of following circle. Take π = 3.14
![Circumference Example 1](/circumference_and_area_of_circles/images/circumference_example1.jpg)
Solution
Step 1:
Given radius r = 7.5 units
Step 2:
Circumference of Circle = 2πr = 2(3.14)7.5 = 47.1 units
Find the circumference of following circle. Take π = 3.14
![Circumference Example 2](/circumference_and_area_of_circles/images/circumference_example2.jpg)
Solution
Step 1:
Given diameter = 19; radius r = 19/2 = 9.5 units
Step 2:
Circumference of Circle = 2πr = 2(3.14)9.5 = 59.66 units
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