Q:
# How many radians are in a circle?

**The number of radians in a circle is equal to 2 pi, or approximately 6.28.** Since there are 360 degrees in a circle, each radian is equal to 360 divided by 6.28, approximately 57.3 degrees.

A radian is the measure of the central angle of a circle that forms an arc equal in length to the radius of the circle. In other words, if the length of the radius is wrapped around the edge of a circle, the central angle that generates that arc measures one radian. In calculus and most other forms of higher mathematics, angles are nearly always measured in radians rather than degrees.

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## How do you calculate the area of a circle?

A: To calculate the area of a circle, square the radius and multiply by pi (approximately 3.14). This enables you to find the area of any circle. Full Answer >Filed Under: -
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## What are internally tangent circles?

A: Internally tangent circles occur when two circles on the same plane intersect at exactly one point and one circle lies within the other. Externally tangent... Full Answer >Filed Under: -
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## How do you figure out the circumference of a circle?

A: To find the circumference of a circle, multiply the diameter by pi or double the radius times pi. Pi is an unchanging number that rounds off to 3.14. Full Answer >Filed Under: -
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## What is a radius?

A: The radius of a circle is the length of a line segment from its center to its outer edge. The same definition also applies to the radius of a sphere. Alter... Full Answer >Filed Under: