Axis the axis of a pyramid is the straight line joining the vertex to the central point of the base.

Axis of a prism the straight line joining the centres of the ends of a prism is called the axis of the prism.

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.

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.

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 makes an angle theta to the x-axis.

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.

Angle between y axis and a straight line