Question

What is latusrectum?.
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Answer 1

Answer:

a chord of a conic section (such as an ellipse) that passes through a focus and is parallel to the directrix.

Answer 2

The latus rectum of a conic section is the chord through a focus parallel to the conic section directrix (Coxeter 1969). "Latus rectum" is a compound of the Latin latus, meaning "side," and rectum, meaning "straight." Half the latus rectum is called the semilatus rectum.