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Circle
Definition of Circle

• A Circle is the locus of all points that are at an equal distance from a given point (on the plane) called the center.

More about Circle

• The distance around a circle is called as its circumference.

Example of Circle

• In the figure shown, O is the center of the circle.
  All points on the black ring, such as A, B, C, and D, are equidistant from O, the center. The length of the black ring is the circumference of the circle.

Solved Example on Circle

A circle has a radius of 6 feet. Find its circumference.
Choices:
A. 37.7 feet
B. 12 feet
C. 6 feet
D. 2 feet
Correct Answer: A
Solution:
Step 1: Circumference of the circle with radius 6 feet is 2 × π × 6 = 37.7 feet.

Related Terms for Circle

• Center
• Point
• Locus
• Plane
• Equidistant

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