Mensuration is a subject or branch of Mathematics.

Mensuration tells us about the lengths of sides, heights and perimeters, measures of angles, surface areas and volumes of 2-dimensional plates and 3-dimensional solids.

 Examples of different shapes are triangle, square, polygon, cylinder, cone, pyramid, cuboid etc.

Some of the real life applications are:-

• Amount of paint required to cover a certain surface area
• Amount of carpet required for a particular room
• Fencing needed for the perimeter of a garden
• Pavement tessellation of a pathway
• Volume of soil needed to fill in a ditch
• The distance around a circular race track
• Travel and roadmap reading
• Amount of fuel needed for a given journey
• Gift wrapping 
• Finding capacities of containers, tanks etc.