Question

Identify the conic that is formed by the intersection of the plane described and double-napped cone.

A plane is perpendicular to m and does not intersect the vertex.

What is the conic section formed?
A. circle
B. parabola
C. ellipse

Answer 1

A. Circle

Explanation:

Perpendicular to m is parallel to the base of the cones (circular).

Therefore the cross section would be a circle (except at the vertex)