# ARTICLE

## Formulas of Maths

* (a+b)2 = a2 + b2 +2ab
* a2 - b2 = (a+b) (a-b)
* (a-b)2 = a2 + b2-2ab
* (a+b)3 = a3 + b3 +3a2 b+3ab2
* (a-b)3 = a3 - b3 - 3a2 b+3ab2
* (a+b+c)3 = a3 +b3 +c3+2ab +2bc+2ac
* (x+a)(x+b) = x2 + x(a+b) + ab
* Area of a rectangle = Length*Breadth
* Perimeter of a rectangle = 2(Length + Breadth)
* Area of a Square = Side * Side
* Perimeter of a Square = 4 * Side
* Area of a parallelogram = Base * Height
* Area of a triangle = ˝ * Base * Height
* Area of a trapezium = ˝ * Height *(Base1 + Base2)
* Area of a circle = p * (radius)2
* Circumference of a circle = 2 * p * radius

Abhijeet Pattnaik
VIII B
Sundergarh, Orissa

#### Words of Appreciation

 prateek You have written second formula wrong . it is a2 - b2 = (a+b)(a-b) Johnson Quite useful to the younger one to develop. Rahul Good Work. This will help a lot of students. M.GANGADHAR Please send formulas. 1+1.1+1.21+1.331+1.4641 total 6.1051 Anubhav Malviya Dear sir; please send me hints tricks and short cuts and formulae of Physics,Chemistry and Mathematics for PET and AIEEE level ASAP.along with if u have detailed solutions of mppet 2008 exam of above subjects (PCM) shashank Please send me hints tricks and short cuts and formulae of Physics,Chemistry and Mathematics for PET and AIEEE level ASAP. Along with if you have detailed solutions of mppet 2008 exam of above subjects (PCM). ajmal good work abijeet. try to add more. this is very useful mathematical formula at all level. share ur knowledge r.saravanan Ya very nice problems. Very useful data. Thanku very much. Prabhu.p Please send forumula a^2+b^2=? tanzeem Please include a2+b2 formula merina It provides knowledge . Well done !! Merina It gives us knowledge but something is missing there. Maneesh mavi durveshpur Very good.

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