List of formulae

=Algebraic Identities=
 * $$(a+b)(a-b)=a^2-b^2$$
 * $$(a+b)^2=a^2+2ab+b^2$$
 * $$(a-b)^2=a^2-2ab+b^2$$
 * $$(x+a)(x+b)=x^2+x(a+b)+ab$$
 * $$(x+a)(x+b)(x+c)=x^3+x^2(a+b+c)+x(ab+bc+ca)+abc$$
 * $$(a+b)^3=a^3+3ab(a+b)+b^3$$
 * $$(a-b)^3=a^3-3ab(a-b)-b^3$$
 * $$a^3+b^3=(a+b)(a^2-ab+b^2)$$
 * $$a^3-b^3=(a-b)(a^2+ab+b^2)$$
 * $$(a+b+c)^2=a^2+b^2+c^2+2ab+2bc+2ca$$
 * $$a^4+a^2b^2+b^4=(a^2+b^2+ab)(a^2+b^2-ab)$$
 * $$(a+b+c)^3-a^3-b^3-c^3=3(a+b)(b+c)(c+a)$$
 * $$(a+b)(b+c)(c+a)=(a+b+c)(ab+bc+ca)-abc$$

=Geometric Results=

=Formulae for commercial arithmetic= =Statistical Formulae= =Mensuration=

Area and Perimeter of Plane Figures
{|class="wikitable" where "h" is the height from any vertex to the opposite side "b" Where a is the side of a square Where l & b are the length & breadth Where a,b,c and d are the sides Where a and b are parallel sides of trapezium. And h is the perpendicular distance between two parallel sides. Where a & b are the sides of Parallelogram Where b is base and h is the perpendicular distance between base b and its parallel side. Where a is the side of a rhombus Where d1 and d2 are diagonals of rhombus
 * Name
 * Perimeter
 * Area
 * Triangle
 * (a+b+c), where a, b, c are sides
 * $$\frac{1}{2}bh$$
 * (a+b+c), where a, b, c are sides
 * $$\frac{1}{2}bh$$
 * Circle
 * $$2{\pi}r$$
 * $${\pi}r^2$$
 * Square
 * $$4a$$
 * Square
 * $$4a$$
 * $$a^2$$
 * Rectangle
 * $$2(l+b)$$
 * $$2(l+b)$$
 * $$lb$$
 * Trapezium
 * $$(a+b+c+d)$$
 * $$(a+b+c+d)$$
 * $$\frac{1}{2}h(a+b)$$
 * Parallelogram
 * $$2(a+b)$$
 * $$2(a+b)$$
 * $$bh$$
 * Rhombus
 * $$4a$$
 * $$4a$$
 * $$\frac{1}{2}(d1*d2)$$