# Math Formulas

## PERIMETER OF A RECTANGLE FORMULA

The sum of all the sides of a rectangle is known as perimeter. Since all the sides of a rectangle are congruent, we just need to know the length and width. Perimeter of a Rectangle Formula is given as, PerimeterofaRectangle=2(Length+Width)PerimeterofaRectangle=2(Length+Width) SOLVED EXAMPLES Question 1: Find the perimeter of a [...]

## PERCENTAGE DECREASE FORMULA

When there is a decrease in the value of something, then, to know the percentage decrease, that is, to know the decrease per hundred, – this formula is used. It is the ratio of the decrease of the decreased value to the original value [...]

## REGULAR TETRAHEDRON FORMULA

Pyramid on a triangular base is a tetrahedron. When a solid is bounded by four triangular faces then it is a tetrahedron. A right tetrahedron is so called when the base of a tetrahedron is an equilateral triangle and other triangular faces are isosceles [...]

## RELATIVE STANDARD DEVIATION FORMULA

Relative standard deviation is also called percentage relative standard deviation formula, is the deviation measurement that tells us how the different numbers in a particular data set are scattered around the mean. This formula shows the spread of data in percentage. If the product comes [...]

## RATIO FORMULA

When we compare the relationship between two numbers dealing with a kind, then we use the ratio formula. It is denoted as a separation between the number with a colon (:). Sometimes a division sign is also used to express ratios. For example, we are making [...]

## PERIMETER OF RHOMBUS FORMULA

When a Rhombus is concerned, it is a flat shape with four same sides and four angles that are NOT necessarily 90 degrees. A rhombus is often called as a diamond or diamond shaped. The total distance traveled along the border of a rhombus [...]

## POINT SLOPE FORM FORMULA

When the equation of a line using line slope of the line and a point through which the line passes, that equation is point slope formula. The steepness of line is slope. The point on the line is in the form of (x,y). The Point [...]

## PERFECT SQUARE FORMULA

When a polynomial is multiplied by itself, then it is a perfect square. Example – this polynomial ax2 + bx + c; if b2 = 4ac is a perfect square. Perfect Square Formula is given as, (a+b)2=a2+2ab+b2(a+b)2=a2+2ab+b2 Solved Examples Question: Is x2 + 10x + 25 a perfect square or not ? Solution: x2 + 10x + 25 = x2 + [...]

## PERIODIC FORMULAS

A function is defined as a relation which possesses one output value for each permissible or allowable input value. The period of a function is the number “T” such that so, if a number is fixed and θθ is any angle, we have the following [...]

## POLYNOMIAL FORMULA

A polynomial expression is the one which has more than two algebraic terms. As the name suggests, Polynomial is a repetitive addition of a monomial or a binomial. The general Polynomial Formula is written as, axn+bxn−1+…..+rx+s=0axn+bxn−1+…..+rx+s=0 If n is a natural number, an – bn = (a [...]

## MEAN ABSOLUTE DEVIATION FORMULA

Average absolute deviation of the collected data set is the average of absolute deviations from a center point of the data set. Abbreviated as MAD, Mean absolute Deviation has four types of deviations that is derived by central tendency, mean median and mode and [...]

## MATRIX FORMULA

Matrix is a way of arrangement of numbers, sometimes expressions and symbols, in rows and columns. Matrix formulas are used to solve linear equations and calculus, optics, quantum mechanics and other mathematical functions. If the two matrix are of the same size as their [...]