An ellipse or circle.
This is called an ellipse.
The general answer is an ellipse.
Ellipse. (sources) internet class.
Ellipse. (sources) internet class.
The "conic section" that is produced when you slice a cone with a plane that passes through only one nappe of the cone but that is not parallel to an edge of the cone is known as an ellipse. In the case where the plane is perpendicular to the axis of the cone, the ellipse becomes a circle.
An ellipse or circle.
This is called an ellipse.
The general answer is an ellipse.
Ellipse. (sources) internet class.
Ellipse. (sources) internet class.
Ellipse. (sources) internet class.
Ellipse. (sources) internet class.
A circle.
The points where the cone and plane intersect will form a circle.
The interception of a plane with a cone parallel to the base of the cone is a circle.
An ellipse which, when the plane is perpendicular to the axis of the cone, becomes a circle.