Maths formulas for class 8 list provided here consolidates all the important formulas that are required in class 8. These maths formulas will help students to solve questions easily and in a more effective way.
Most of the students of class 8 feel that formulas are difficult to grasp and remember. However, when the logic behind problem and formulas are understood properly, solving any kind of Maths problem becomes easier. If the students are confident with all the below-mentioned formulas, they can easily solve different variations of questions and get acquainted with the concepts better.
Class 8 Maths Formulas List
Class 8 formulas in Maths are segregated into two types here, which are Geometry formulas and Algebra formulas. The common and the most important class 8 Maths formulas are mentioned in the tables given below.
Geometry Formulas for Class 8
To recall, geometric shapes are of two types which are 2D shapes and 3D shapes (or solid shapes). The list for all the 2D and 3D geometric shapes are:
Geometry Shapes Formulas for Solid Shapes:
Name of the Solid | Lateral / Curved Surface Area | Total Surface Area | Volume |
---|---|---|---|
Cuboid | 2h (l + b) | 2 (lb + bh + hl) | l × b × h |
Cube | 4a^{2} | 6a^{2} | a^{3} |
Right Prism | Perimeter of Base × Height | Lateral Surface Area + 2(Area of One End) | Area of Base × Height |
Right Circular Cylinder | 2 (π × r × h) | 2πr (r + h) | πr^{2}h |
Right Pyramid | ½ (Perimeter of Base × Slant Height) | Lateral Surface Area + Area of the Base | ⅓ (Area of the Base) × Height |
Right Circular Cone | πrl | πr (l + r) | ⅓ (πr^{2}h) |
Sphere | 4πr^{2} | 4πr^{2} | 4/3 (πr^{3}) |
Hemisphere | 2πr^{2} | 3πr^{2} | ⅔ (πr^{3}) |
Geometry Shapes Formulas for 2D Shapes:
Geometric Area | Geometric Area Formula |
---|---|
Square | a^{2} |
Rectangle | a × b |
Circle | πr^{2} |
Ellipse | πr_{1}r_{2} |
Triangle | ½(b × h) |
Algebra Formulas for Class 8
Some important 8th class formulas related to Algebra are:
Algebraic Identities For Class 8 | |
---|---|
(a + b)^{2 }= a^{2 }+ 2ab + b^{2} | |
(a − b)^{2 }= a^{2 }− 2ab + b^{2} | |
(a + b) (a – b) = a^{2 }– b^{2} | |
(x + a) (x + b) = x^{2 }+ (a + b)x + ab | |
(x + a) (x – b) = x^{2 }+ (a – b)x – ab | |
(x – a) (x + b) = x^{2 }+ (b – a)x – ab | |
(x – a) (x – b) = x^{2 }– (a + b)x + ab | |
(a + b)^{3 }= a^{3 }+ b^{3 }+ 3ab (a + b) | |
(a – b)^{3 }= a^{3 }– b^{3 }– 3ab (a – b) |
These are some of the important 8th class formulas in Maths which are crucial for solving problems and for the exams. Check out the below-given links, which are a few important Maths resources for class 8 Maths.
Class 8 Maths Important Questions | CBSE Notes For Class 8th Maths |
Sample Papers For Class 8 Maths | Question Papers For Class 8 Maths |
I want all the of ncert class 8 maths chapter 11
Please visit: https://byjus.com/ncert-solutions-class-8-maths/chapter-11-mensuration/
It’s easy for learning process for childrens
ILike it
I need Exponent and Power all formulae
Check here: https://byjus.com/maths/exponents-powers/
Can you give me last year (2019-2020)CBSE maintrick exam question paper of class 10.
Sorry, we don’t have anything particular to (2019-2020)CBSE maintrick exam question paper of class 10.
But we do have previous year question papers for class 10 Maths: https://byjus.com/cbse-study-material/cbse-previous-year-question-paper-class-10/
Hope it will help you out.
This is very good
very good formulas by byjus it’s very intrseting
Thank you Byjus expert and their team for helping me a lot
can u give me maths formulaes for chapter 1
I want time wok amd distance all formulass
yes this is very nice for learning math formulas thankyou byju’s for this it is very helpful
I need simple interest and compound interest formulas.
Please check:
https://byjus.com/maths/compound-interest/
https://byjus.com/maths/simple-interest/
I want to thank all the byju’s teachers to help me to do my best. thank you
I want rational numbers formulas and basics
Hi, find all about rational numbers here.
i can’t find the simple interest formula
Simple interest = (Principal*Time*Rate)/100
Learn in detail here: Simple Interest Formula