Radians as "radius units"

Remember that an angle has a measure of one radian when the length of the part of the circle it cuts out is exactly the same as the radius of the circle.

Move the slider marked "Change angle" to change the angle.
If you want to adjust the circle's radius, use the "radius" slider.

Created by Scott Sutherland with GeoGebra.
Geogebra file for downloading.
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