There are roughly 0.785 radians in 45 degrees, which is the approximation of pi divided by four. It is only an approximation because pi is an irrational number that does not terminate. More »

A radian to degree converter is a tool that converts an angle measured in radians into the same angle in degrees. These calculators use a simple formula to convert between radians and degrees. More »

To convert degrees to radians, simply multiply the number of degrees by π /180°. Though pi can be converted into its decimal approximation 3.14, it is generally acceptable to leave it as "pi" without converting to decima... More »

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The length of an arc of a circle is equal to the angle subtended by the arc, in radians, times the radius of the circle. For an angle measured in degrees, the arc length is the angle, in degrees, times the radius times p... More »

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. More »

When considered in radians, the arctan of the square root of 3 is equal to pi over 3, or 1.047. If the square root of 3 is considered in degrees, the arctan of the square root of 3 is equal to about 59.97. More »

A 90-degree angle has an internal angle equivalent to 90 degrees and forms a perfect L shape. It is also known as a right angle. More »