Formulae

Why do you need to memorize formulae?

If you want to understand math easily then learning and memorizing formulae is very important. So here are the formulae that you will come around in these chapters:-

• The perimeter of a rectangle = 2(length + breadth) (or) length+breadth+length+breadth

• Area of a rectangle: length*breadth

• The perimeter of a square: 4*Side

• Area of a square: Side*Side (or) Side²

• The Circumference of a circle: π*2*r

• Area of a circle: π*r*r or π*r(squared)

• The perimeter of a triangle: a+b+c (sum of all sides)

• Area of a triangle: 1/2*Base*Height

• The perimeter of a parallelogram: a+b+c+d (sum of all the sides)

• Area of a parallelogram: Base*Height

• Identity-1 : (a+b)² = a² + 2ab + b²

• Identity-2: (a-b)² = a² + 2ab + b²