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
The shape described by the intersection of the cone and the plane is simply a circle.
square
a square
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.