Which term denotes the distance around a circle?

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Multiple Choice

Which term denotes the distance around a circle?

Explanation:
The main concept is that the distance around a circle is its circumference. Circumference is the length of the circle’s boundary, the path you’d travel if you walked once around the edge. The radius, by contrast, is a straight-line distance from the center to any point on the edge, while the diameter is that same idea but across the circle, passing through the center and equal to twice the radius. Perimeter is a general term for the boundary length of any closed shape, but for a circle the specific term used is circumference. If you know the radius, you can find the circumference with C = 2πr (or with C = πd if you know the diameter).

The main concept is that the distance around a circle is its circumference. Circumference is the length of the circle’s boundary, the path you’d travel if you walked once around the edge. The radius, by contrast, is a straight-line distance from the center to any point on the edge, while the diameter is that same idea but across the circle, passing through the center and equal to twice the radius. Perimeter is a general term for the boundary length of any closed shape, but for a circle the specific term used is circumference. If you know the radius, you can find the circumference with C = 2πr (or with C = πd if you know the diameter).

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