This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Radian Angle Definition.svg Definition of an Angle in terms of radius and arc length Replacement for RadianAngle svg which seens not to work jjbeard All rights released Radian
Page 2023 Free-images.com. All images are Public Domain