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# Mensuration Formulas Class 8 Math

Class 8
Hey, 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.

## Mensuration formulas class 8 Math

Area and perimeter of Rectangle and Square
1. Area of rectangle (A) = length(l) × Breath(b), A = l× b
2. Perimeter of a rectangle (P) = 2 × (Length(l) + Breath(b)), P = 2 × (l + b)
3. Area of a square (A) = Length (l) × Length (l), A = l×l
4. Perimeter of a square (P) = 4 × Length (l), P = 4 × l
5. Area of a quadrilateral = 1/2 d(h1 + h2) square unit, where, d denotes the length of diagonal AC.
6. Area of parallelogram = Base $\times$ Height square unit.
7. Area of trapezium $=\frac{1}{2} \times[$ Sum of parallel sides $] \times$ Height square unit.
8. Area of an equilateral triangle $=\frac{\sqrt{3}}{4} \times(\text { Side })^{2}$ square unit.
9. Area of a triangle $=\frac{1}{2} \times$ Base $\times$ Height square unit.
10. The perimeter of a circle is called its circumference.
11. The number $\pi$ is not a rational number. It is often used as a rational approximation and its value is $\frac{22}{7}$
12. 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.
13. Area of a circle $=\pi \times$ (Radius) $^{2}=\pi r^{2}$ square unit.
14. Circumference of a circle $=2 \pi \times$ Radius $=2 \pi r$ unit.
15. Area of rhombus $=\frac{1}{2}$ (Product of diagonals) $=\frac{1}{2} \times \mathrm{d}_{1} \times \mathrm{d}_{2}$ square unit.
16. Surface area of a cuboid $=2[\mathrm{lb}+\mathrm{bh}+\mathrm{hl}]$ square unit
17. Surface area of a cube $=6 \mathrm{I}^{2}$ square unit
18. Surface area of a cylinder $=2 \pi r(h+r)$ square unit
19. Surface area of Diagonal of cuboid $=\sqrt{l^{2}+b^{2}+h^{2}}$ units
20. Surface area of Lateral surface area of cuboid $=[2(l+b) \times h]$ square unit
21. Surface area of Lateral surface area of the cube $=4 a^{2}$ square unit
22. Surface area of Lateral (curved) surface area of a cylinder $=2 \pi$ rh square unit
23. Volume of Cuboid $=\mid \times \mathrm{b} \times \mathrm{h}$ (unit) $^{3}$
24. Volume of Cube $=I^{3}$ (unit) $^{3}$
25. Volume of Cylinder $=\pi r^{2} h$ (unit) $^{3}$
26. Volume of Diagonal of the cube $=(\sqrt{3} a)$ units.
27. $1 \mathrm{~m}^{2}=100 \mathrm{dm}^{2}=10000 \mathrm{~cm}^{2}$
28. $1 \mathrm{~cm}^{2}=100 \mathrm{~mm}^{2}$
29. Area of a trapezium $=\frac{1}{2}$ (sum of parallel sides) $\times$ height
30. Total surface area of a cuboid $=2(\mathrm{lb}+\mathrm{bh}+\mathrm{hl})$
31. Lateral (curved) surface area of a cylinder $=2 \pi r h$
32. Total surface area of a cylinder $=2 \pi r(h+r)$
33. Volume of cuboid $=$ Ibh OR Volume of cuboid $=$ area of the base $\times$ height
34. Total surface area of a cube $=6I^{2}$, where $I$ is the side of the cube.
35. Volume of cylinder $=\pi r^{2} h$

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

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Leela sasidhar
Jan. 29, 2024, 6:35 a.m.
Write the formula
Amit
Dec. 31, 2023, 6:35 a.m.
Hii
Naitik
Nov. 4, 2023, 4:42 p.m.
Well done
June 7, 2023, 2:50 p.m.
Teja
May 23, 2023, 6:35 a.m.
Fromulas are helped in exam
Akshu
Oct. 13, 2023, 6:35 a.m.
Yes
YJL
March 17, 2024, 6:35 a.m.
Yes
Teja
May 23, 2023, 6:35 a.m.
Fromulas are helped in exam
Teja
May 23, 2023, 6:35 a.m.
Fromulas are helped in exam
Shobha tomar
May 14, 2023, 6:35 a.m.
9977923550
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.
JRK Group
April 9, 2023, 6:35 a.m.
Waste of net
Dashmeet
March 8, 2024, 6:35 a.m.
Right
Dashmeet
March 8, 2024, 1:47 p.m.
Right
Dashmeet
March 8, 2024, 1:47 p.m.
Right
Amena saba
March 22, 2023, 6:35 a.m.
chapter Mensuration formula
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
neil ezra anthony
March 2, 2023, 5:48 p.m.
thank you so much for these formulas. my annuals are coming up and this really helped me recap the whole lesson without stressing out about the different types of formulas. thank you again.
Sinchana
Feb. 14, 2023, 3:37 p.m.
These formulas helped me a lot. Thank you
Ms. Dhoni
Nov. 29, 2022, 7:18 p.m.
You can do better
Amit kumar
March 2, 2023, 5:48 p.m.
I am your big fans Mahendra singh Dhoni
Himalaya
March 11, 2023, 7:29 p.m.
Hes a fake
trax
March 11, 2023, 7:29 p.m.
hi mises dhoni
Saba
Aug. 25, 2022, 6:08 p.m.
Hi
M.Sahasra Chowdary
June 12, 2022, 8:48 p.m.
Are there any formulas to find area and perimeter of pentagon,hexagon,heptagon,octagon,decagon etc