Eccentricity of an Ellipse
Measure of how circular Ellipse is
The eccentricy of an ellipse is a measure of how nearly circular the ellipse. Eccentricity is found by the following formula
eccentricity = c/a
where c is the distance from the center to the focus of the ellipse
a is the distance from the center to a vertex
Formula for the Eccentricy of an Ellipse
The special case of a circle's eccentricty
A circle is a special case of an ellipse. Analogous to the fact that a square is a kind of rectangle, a circle is a special case of an ellipse.
In terms of the eccentricty, a circle is an ellipse in which the eccentricty is zero.
Practice Problems
Use the formula for eccentricty to determine the eccentricity of the ellipse below
Determine the eccentricity of the ellipse below
What is the eccentricity of the ellipse in the graph below?
Determine the eccentricity of the ellipse below?
