Mensuration Formula:
At first, let us know about Mensuration. It is a branch of mathematics which deals with the measurement of several parameters such as length, breadth, perimeter, area and volume of 2dimensional and 3dimensional objects. Mensuration formula for class 6, 7, 8, 9, 10 contains data of lines and angles for measurement of several parameters. Generally, it is used for geometrical figures where there is a need to find out dimensions, perimeter, area, volume and several other physical quantities.
Perimeter: It is the path surrounding the object’s area. We can also say that the length of boundary of an object is its perimeter. It is simply the addition of length so it has no powered units. Simply its unit is in m (metre), cm (centimetre), km (kilometre) etc. Mensuration formula for perimeter is different for different figures.
Area: It is the surface occupied by the 2dimensional body. We can also define the area as that surface of object in a plane closed within a boundary. Millions of lines in a plane coexist to form an area so Its unit is squared as we multiply length to lengths. Its units are cm^{2}, m^{2}, km^{2} etc. The mensuration formula for area is different for different geometrical bodies.
Volume: It is the space occupied by any threedimensional body within its surface boundary. How much Space it occupies includes several dimensions such as length, breadth, height. So its unit is always expressed in cubic units as cm^{3}, m^{3}, km^{3}etc.
List of all the necessary mensuration formula orderly:
2D figures  Figures  Formula 
Mensuration formula for Triangle 
Perimeter= Sum of all sidesArea = 1/2 b x h
Area = \(\sqrt{s(sa)(sb)(sc)}\) a, b, c are sides of triangle. Where s=\(\frac{a+b+c}{2}\) Area=\(\frac{1}{2}\) (bxh) 

Mensuration formula for Equilateral Triangle 
Perimeter= 3xSide
Area = \(\frac{\sqrt{3}}{4}\) (side)^{2} 

Mensuration

Perimeter: 4 x side
Area: (side)^{2} 

Mensuration

Perimeter= 2(length + breadth)
Area= length x breadth 

Mensuration

Perimeter= 2(1^{st }side + 2^{nd} side)
Area= base x height 

Mensuration

Perimeter= 4 x side
Area= \(\frac{1}{2}\) D_{1} x D_{2} 

Mensuration

Perimeter= sum of all sides
Area= \(\frac{1}{2}\) (sum of parallel sides)x altitude 

Mensuration

Circumference= 2πr
Area= πr^{2} (where r is radius) 

Mensuration

Perimeter= πr+2r
Area=\(\frac{1}{2}\)πr^{2} 
Mensuration formula for 3D figures:
3 D figures  Figures  Formula 
Mensuration

Surface Area: 2(lb+bh+lh)
Volume = L x B x H Diagonal = \(\sqrt{l^{2}+b^{2}+h^{2}}\) 

Mensuration

Surface Area= 6 x (side)^{2}
Volume = (side)^{3} Diagonal = \(\sqrt{3}\)a 

Mensuration

Lateral or curved surface area = perimeter of base x height
Total surface area = lateral surface area + 2(area of ends) Volume= Area of base x Height 

Mensuration

Lateral surface area = 2πrh
Total surface area= 2πrh + 2πr^{2} Volume= πr^{2}h 

Mensuration

Lateral surface area= \(\frac{1}{2}\) perimeter of base x slant height
Total surface area= lateral surface area + area of base Volume= \(\frac{1}{3}\) (area of base) x height 

Mensuration

Surface area= 4πr^{2}
Volume= \(\frac{4}{3}\)πr^{3} 

Mensuration

Lateral Surface area= 2πr^{2}
Total surface area= 3πr^{2} Volume= \(\frac{2}{3}\)πr^{3} 

Mensuration

Slant Height= l = \(\sqrt{r^{2}+h^{2}}\)
Lateral surface area= πrl Total surface area = πrl + πr^{2} Volume= \(\frac{1}{3}\) πr^{2}h 

Mensuration

Slant Height= l = \(\sqrt{{h}^{2}+ ({r}_1{r}_2)^{2}}\)
Lateral surface area= πl(r_{1}+r_{2}) Total surface area= πl(r_{1}+r_{2}) + πr_{1}^{2}+ πr_{2}^{2} Volume= \(\frac{1}{3}\)πh(r_{1}^{2}+r_{1}r_{2}+r_{2}^{2}) 
Mensuration formula for Bank, railway, SSC exam and for class 6th to 10th:
The list of formulas with welldefined images will help you to memorise it easily. The formula list will help you to solve the problems related to mensuration much easily. Basic formulas are for class 6, then a little more added in each section of class 7, class 8, class 9, class 10 and so on.
FAQ on Mensuration Formula:
 What are mensuration formulas?
Mensuration itself means To measure. In mathematics, these formulas help in a different kind of measurement of 2D, 3D figure such as its perimeter, lateral and total surface area, Volume. These formula ease the problemsolving way.  How to remember mensuration formulas?
To remember mensuration formulas you must make application of each formula in different types of problems. The more you practice problems more you will learn. Here formulas with figures is given so that it will be easy for you to learn.
More Formulas 
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Lines and Angles Formula 
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