Pyramids

When 3 or more triangular faces share a common vertex and make a Geometry, which is called as a pyramid. The base of a pyramid may be any triangle shape, square shape or any other Polygon shape. If base of pyramid have triangle shape, then the given pyramid has 4 faces. Pyramid is a simplest polyhedron, which is also called as a tetrahedron. The shape of pyramid is taking from famous ancient Egyptian pyramids. Each pyramid has only one base and the other faces are all congruent Triangles and all Congruent Triangles share a common vertex, which is the top Point. Now we discuss formulas of pyramids for calculating volume and surface area of pyramids–

Volume of pyramids = (1 / 3) * B * H,
Where ‘B’ is the base of pyramid and H is the height of pyramids.
Surface area of pyramid = B + (1 / 2) * P * l,
Here ‘B’ is base length, ‘P’ is perimeter and l is a side length of pyramid.

Now we discuss types of pyramids:
There are following types of pyramids–
Triangular pyramid – A pyramid, which has 4 faces and which base made a triangle shape is called as a triangular pyramid. All 3 side faces of triangular pyramid made a triangular shape, which is also another property of triangular pyramid. 

Square pyramid - A pyramid, which has 5 faces and which base made a Square shape is called as a square pyramid. All 4 side faces of square pyramid made a triangle shape, that’s why we call this pyramid as a square pyramid. 

Pentagonal pyramid - A pyramid, which has 6 faces and which base made a pentagonal shape is called as a pentagonal pyramid. All 5 side faces of square pyramid made a triangle shape, that’s why we call this pyramid as a pentagonal pyramid. 

These are 3 types of pyramids, which are define in geometry and each pyramid has their different property like right and oblique pyramid or regular and irregular pyramid. All these pyramids are depending on their shapes.