# Mensuration Formulas Class 8 Math

Class 8Hey, students are you looking for all formulas of Mensuration or Mensuration formulas in class 8 Math? If yes. Then you are at the right place.
In this post, we have listed all the formulas of Mensuration class 8 that you can use to learn and understand the concepts easily.

If you want to improve your class 8 Math mensuration concepts, then it is super important for you to learn and understand all the formulas.

By using these formulas you will learn how to find the area of a rectangle, the perimeter of a rectangle, the area of a quadrilateral, the area of a parallelogram, the area of a circle, the Surface area of a cube, the Surface area of a cube, Volume of Diagonal of the cube, and many more.

With the help of these formulas, you can revise the entire chapter easily.

Also Read,

Download NCERT Class 8 Math Book PDF

Download NCERT Class 8 Science Book PDF

Download NCERT Class 8 Science Exemplar PDF

Download NCERT Class 8 Math Exemplar PDF

If you have any Confusion related to Mensuration formulas class 8 Math then feel free to ask in the comments section down below.

To watch Free Learning Videos on Class 8 Math by Kota’s top Faculties Install the eSaral App

If you want to improve your class 8 Math mensuration concepts, then it is super important for you to learn and understand all the formulas.

By using these formulas you will learn how to find the area of a rectangle, the perimeter of a rectangle, the area of a quadrilateral, the area of a parallelogram, the area of a circle, the Surface area of a cube, the Surface area of a cube, Volume of Diagonal of the cube, and many more.

With the help of these formulas, you can revise the entire chapter easily.

## Mensuration formulas class 8 Math

Area and perimeter of Rectangle and Square- Area of rectangle (A) = length(l) × Breath(b), A = l× b
- Perimeter of a rectangle (P) = 2 × (Length(l) + Breath(b)), P = 2 × (l + b)
- Area of a square (A) = Length (l) × Length (l), A = l×l
- Perimeter of a square (P) = 4 × Length (l), P = 4 × l
- Area of a quadrilateral = 1/2 d(h1 + h2) square unit, where, d denotes the length of diagonal AC.
- Area of parallelogram = Base $\times$ Height square unit.
- Area of trapezium $=\frac{1}{2} \times[$ Sum of parallel sides $] \times$ Height square unit.
- Area of an equilateral triangle $=\frac{\sqrt{3}}{4} \times(\text { Side })^{2}$ square unit.
- Area of a triangle $=\frac{1}{2} \times$ Base $\times$ Height square unit.
- The perimeter of a circle is called its circumference.
- The number $\pi$ is not a rational number. It is often used as a rational approximation and its value is $\frac{22}{7}$
- The ratio of the circumference of a circle to its diameter is always constant and denoted by the Greek letter $\pi$. Thus, $\frac{c}{d}=\pi$. The value of $\pi$ is $3.14$ correct to two decimal places.
- Area of a circle $=\pi \times$ (Radius) $^{2}=\pi r^{2}$ square unit.
- Circumference of a circle $=2 \pi \times$ Radius $=2 \pi r$ unit.
- Area of rhombus $=\frac{1}{2}$ (Product of diagonals) $=\frac{1}{2} \times \mathrm{d}_{1} \times \mathrm{d}_{2}$ square unit.
- Surface area of a cuboid $=2[\mathrm{lb}+\mathrm{bh}+\mathrm{hl}]$ square unit
- Surface area of a cube $=6 \mathrm{I}^{2}$ square unit
- Surface area of a cylinder $=2 \pi r(h+r)$ square unit
- Surface area of Diagonal of cuboid $=\sqrt{l^{2}+b^{2}+h^{2}}$ units
- Surface area of Lateral surface area of cuboid $=[2(l+b) \times h]$ square unit
- Surface area of Lateral surface area of the cube $=4 a^{2}$ square unit
- Surface area of Lateral (curved) surface area of a cylinder $=2 \pi$ rh square unit
- Volume of Cuboid $=\mid \times \mathrm{b} \times \mathrm{h}$ (unit) $^{3}$
- Volume of Cube $=I^{3}$ (unit) $^{3}$
- Volume of Cylinder $=\pi r^{2} h$ (unit) $^{3}$
- Volume of Diagonal of the cube $=(\sqrt{3} a)$ units.
- $1 \mathrm{~m}^{2}=100 \mathrm{dm}^{2}=10000 \mathrm{~cm}^{2}$
- $1 \mathrm{~cm}^{2}=100 \mathrm{~mm}^{2}$
- Area of a trapezium $=\frac{1}{2}$ (sum of parallel sides) $\times$ height
- Total surface area of a cuboid $=2(\mathrm{lb}+\mathrm{bh}+\mathrm{hl})$
- Lateral (curved) surface area of a cylinder $=2 \pi r h$
- Total surface area of a cylinder $=2 \pi r(h+r)$
- Volume of cuboid $=$ Ibh OR Volume of cuboid $=$ area of the base $\times$ height
- Total surface area of a cube $=6I^{2}$, where $I$ is the side of the cube.
- Volume of cylinder $=\pi r^{2} h$

Also Read,

Download NCERT Class 8 Math Book PDF

Download NCERT Class 8 Science Book PDF

Download NCERT Class 8 Science Exemplar PDF

Download NCERT Class 8 Math Exemplar PDF

If you have any Confusion related to Mensuration formulas class 8 Math then feel free to ask in the comments section down below.

To watch Free Learning Videos on Class 8 Math by Kota’s top Faculties Install the eSaral App

## Comments

Tulasi Reddy

April 17, 2023, 3:26 p.m.

Can you please send 9 and 10 classes formulas also because it is the time to know how to use the formulas.

HARDIK TIWARI

March 17, 2023, 6:35 a.m.

He this is very helpfull for me and in my thinking this is also going to helpfull for others

S.Harini

March 11, 2023, 7:29 p.m.

I am confused because it is all combined.
I wanted to be separated with columns like area one column and perimeter another like that it will be easy to understand

Agrima

March 2, 2023, 5:48 p.m.

Please some important questions of chapter 11 for class 8 please sir my exam is soon