Regular pyramid a pyramid is said to be a regular pyramid if its base is a regular figure i.e. all sides of its base are equal.

Triangular pyramid a pyramid is called a triangular pyramid if its base is a triangle.

Triangular pyramid a pyramid is called a triangular pyramid if its base is a triangle.

Quadrilateral pyramid a pyramid is called a quadrilateral pyramid if its base is a quadrilateral.

Quadrilateral pyramid a pyramid is called a quadrilateral pyramid if its base is a quadrilateral.

The pyramid of number is based on

Right pyramid a pyramid is said to right pyramid if the perpendicular dropped from the vertex on the base meets the base at its central point.

Right pyramid a pyramid is said to right pyramid if the perpendicular dropped from the vertex on the base meets the base at its central point i.e. the centre of the inscribed or circumscribed circle. In other words the vertex of the pyramid lies on the perpendicular to the base drawn through its centre. Otherwise the pyramid is called an oblique prism.

The age pyramid with broad base indicates

Regular polygon a polygon is called a regular polygon if all its sides are equal and all its angles are equal.