Pyramid a pyramid is a solid whose base is a plane rectilinear figure and whose side-faces are triangles having a common vertex outside the plane of the base.

A pyramid is a polyhedron whose lateral faces are

A pyramid is a solids figure, the base of which is

Tetrahedron a tetrahedron is a pyramid whose base is a a triangle.It has six edges and four faces all triangular.

Prisms a prism is a solid whose side faces are parallelograms and whose ends(or bases) are congruent parallel rectilinear figures.

Regular pyramid a pyramid is said to be a regular pyramid if its base is a regular figure.

Having given the bases and the sum of the areas of a number of triangles which have a common vertex,show that the locus of the vertex is a straight line.

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.

Find the number of vertices of a pyramid, whose base is a pentagon.

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.