Circumference - Concept

Concept Concept (1)

Circumference can be thought of as the "perimeter" of a circle or the distance around a circle. Since pi is the ratio of circumference to diameter, circumference can be calculated by multiplying the circle's diameter by pi. Another formula substitutes d = 2r, where one diameter equals two radii, and C = 2(r)(pi). Related topics include area of a circle, arc length, and parts of a circle.

Sample Sample Problems (4)

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Circumference - Problem 1
Problem 1
How to calculate the circumference of a circle given diameter or radius.
Circumference - Problem 2
Problem 2
How to find the radius of a circle given circumference.
Circumference - Problem 3
Problem 3
How to find the perimeter of a figure that appears to be a track.
Circumference - Problem 4
Problem 4
How to find the circumference of a figure formed by two different circles and a straight line.