Question

Which term describes the red curve in the figure below?

• A. Hyperbola
B. Circle
C. Parabola
• D. Ellipse

Answer 1

A cone has a circular base. So, the answer to your question is B for circle.

Answer 2

B. Circle

When a plane intersects a cone and is perpendicular to the height of the cone, then it forms a circle. If the plane intersected the cone at an angle, we would have an ellipse.