Height the length of the line segment joining the vertex to the center of the base is called the height of the cone.

Slant height the length of the line segment joining the vertex to any point on the circular edge of the base is called the slant height of the cone.

Axis the line segment joining the centres of two circular bases is called the axis of the cylinder.

Axis the line segment joining the centres of two bases is called the axis of the cylinder.

Height the length of the axis of the cylinder is called the height of the cylinder.

Vertex the fixed point V is called the vertex of the cone.

Slant height the slant height of a regular right pyramid is the line segment joining the vertex to the midpoint of any-one of the sides of the base.

Slant height the slant height of a regular right pyramid is the line segment joining the vertex to the midpoint of anyone of the sides of the base.

Find the length of the line segment joining the vertex of the parabola y^(2)=4ax and a point on the parabola where the line segment make and angle theta to the x-axis.