# Different Types of Ellipses

There are two types of ellipses: one ellipse has the X-axis as the major axis and the other has the Y-axis as the major axis. In the given table we explain different components and graphs of ellipses.

Standard Ellipses

 Equation $\frac{{{x^2}}}{{{a^2}}} + \frac{{{y^2}}}{{{b^2}}} = 1,\,\,\,a > b$ $\frac{{{x^2}}}{{{b^2}}} + \frac{{{y^2}}}{{{a^2}}} = 1,\,\,\,a > b$ Focus $\left( { \pm ae,0} \right)$ $\left( {0, \pm ae} \right)$ Directrices $x = \pm \frac{a}{e}$ $y = \pm \frac{a}{e}$ Major Axis $y = 0$ $x = 0$ Vertices $\left( { \pm a,0} \right)$ $\left( {0, \pm a} \right)$ Co-Vertices $\left( {0, \pm b} \right)$ $\left( { \pm b,0} \right)$ Center $\left( {0,0} \right)$ $\left( {0,0} \right)$ Eccentricity $e = \frac{{\sqrt {{a^2} - {b^2}} }}{a},\,\,\,a > b$ $e = \frac{{\sqrt {{a^2} - {b^2}} }}{a},\,\,\,a > b$ Length of Major Axis $2a$ $2a$ Length of Minor Axis $2b$ $2b$ Length of Latus Rectum $\frac{{2{b^2}}}{a}$ $\frac{{2{b^2}}}{a}$ Graph