MATH FORMULA

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Di bawah ini ada beberapa formula yang sangat berguna,

•  Area of rectangle  = length x width

• Area of square = 2( lenght of side )

• Area of triangle  = 1/2 x base x height

•  Area of parallelogram  = base x height

• Area of trapezium  = 1/2 x sum of parallel sides x height

•  Circumference of circle  = πd / 2πr

•  Area of circle =πr2

• Surface Area and Volume of a Sphere

• Surface Area and Volume of a Cone

• Surface Area and Volume of a Cylinder

• Surface Area and Volume of a Rectangular Prism

• Surface Area and Volume of a Square Based Pyramid

• Surface Area and Volume of a Isosceles Triangular Prism

• Area of a Circle Sector

• Surface Area of An Elipse

• Length of an Arc Formula

• Fractions formulas: 

Converting a mixed number to an improper fraction:




Converting an improper fraction to a mixed number:

• Formula for a proportion: 

In a proportion, the product of the extremes (ad) equal the product of the means(bc), 

Thus, ad = bc

• Percent: 

Percent to fraction: x% = x/100

Percentage formula: Rate/100 = Percentage/base

Rate: The percent.
 
Base: The amount you are taking the percent of.

Percentage: The answer obtained by multiplying the base by the rate

• Consumer math formulas: 

Discount = list price × discount rate

Sale price = list price − discount

Discount rate = discount ÷ list price

Sales tax = price of item × tax rate

Interest = principal × rate of interest × time

Tips = cost of meals × tip rate

Commission = cost of service × commission rate