Question

The latus-rectum of a conic section is:

Options

• Any chord through the focus

• A focal chord perpendicular to the axis 

• A chord perpendicular to the directrix

• The axis of the conic

Answer 1

A focal chord perpendicular to the axis 

Explanation: 

The latus-rectum is a focal chord that is also perpendicular to the axis of symmetry. It is a specific, important focal chord, not just any chord through the focus.