The total distance around the line that forms the ellipse

When the circumference of a circle is so easy to find, it comes as a surprise that there is no easy way to find the circumference of an ellipse.
There is simply no easy way to do it.
Calculating it precisely requires the use of calculus, and is beyond the scope of this volume.
If the ellipse has equal major and minor axes, it is a circle and the circumference is obvious.

- Ellipse definition
- Major / minor axis of an ellipse
- Semi-major / Semi-minor axis of an ellipse
- Area of an ellipse
- Perimeter (circumference) of an ellipse
- Tangent to an ellipse
- Eccentricity of an ellipse
- Properties of elliptical mirrors

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