Question

What are the parts of a circle?

wikiHow Staff Editor

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The distance around the outside of a circle is called the circumference, while the distance across is called the diameter. If you measure from the center of the circle to a point on the outer edge, that’s the radius. Other parts include a sector (a wedge or slice of the circle that goes from the center to 2 points on the outer edge), an arc (part of the outer edge of the circle), and a chord (a line drawn through any 2 points on the circle—the diameter is a kind of chord).