Right Circular Cone
A parabola is the figure formed by the intersection of a circular cone and a plane that lies parallel to the edge of the cone. (the cone does not have to be a right [90°] circular cone).
A line is.
A Circle.
An hourglass
a square
A parabola is the figure formed by the intersection of a circular cone and a plane that lies parallel to the edge of the cone. (the cone does not have to be a right [90°] circular cone).
Sure. You could have a set of parallel lines crossed by two transversals that are parallel to each other. The figure formed by their intersection would be a parallelogram! That's one way of looking at it...
A line is.
line
A Circle.
The intersection of two lines is a point. If both lines are straight the figure of four separate triangles are formed. The type of triangles are dependent on the angle of the intersection.
An edge.
An hourglass
square
a square
The shape described by the intersection of the cone and the plane is simply a circle.
A prism. A prism is named for its base, eg a triangular prism has a triangle for the base. If the base is a circle, the circular prism is called a cylinder.