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Convert between Degrees and Radians

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More Lessons for Grade 11
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Videos, worksheets, games and activities to help Algebra II students learn how to convert from degrees to radians and from radians to degrees.

What is a radian?
One radian is the measure of the central angle whose arc length is the same as the radius of the circle.

The following diagrams show what is a radian. Scroll down the page for more examples and solutions.

What is a radian

What is the relationship between radians and degrees?
1 radian = 180°/π
π radian = 180°
2π radian = 360°

Radian Measure
This lesson discusses radian measure and how it relates to measuring angles in degrees, leading to converting between the measurement systems.
There are also a few examples involving measuring angles in radians.

Radians and degrees
What a radian is.
Converting radians to degrees and vice versa.
How to Convert Degrees to Radians?
Converting degrees to radians in geometry comes down to multiplying by an appropriate conversion factor.
Degrees and Radians
Converting from Degrees to Radians

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