Wha is a vertex, a focus, an eccentricity, and a latus rectum

3 answers

depends on the conic section.

google is your friend. Just look up "parabola" or "ellipse" etc for many discussions of their properties.
Its on the ellipse. Google isn't helping.
that's rubbish.

Just typing in ellipse, I got many hits, and as usual, wikipedia had a very good article.

https://en.wikipedia.org/wiki/Ellipse