The line segment that connects two points of a conic section, that is perpendicular to the major axis of the conic section and that passes through the focus of the conic section.

- The
**major axis of a parabola**is its axis of symmetry. - The
**major axis of an ellipse**is its longest axis. - The
**major axis of a hyperbola**is the axis that passes through the two foci of the hyperbola.

### Properties

- The length of the latus rectum of a parabola is equal to 4 times its focal length.
- The length of the latus rectum of an ellipse is equal to 2 times the square of the length of the conjugate axis divided by the length of the major axis.
- The length of the latus rectum of a hyperbola is equal to 2 times the square of the length of the major axis divided by the length of the conjugate axisé
- The length of the latus rectum of a circle is the length of its diameter.