Simplified Basic Mathematics
Area of a circle: pi multiplied by radius squared
Circumference of a circle: pi multiplied by diameter or 2 multiplied by pi multiplied by radius
Area of a triangle: base of triangle multiplied by height of triangle divided by two
Surface area of a cube: 6 multiplied by a side squared
Surface are of a rectangular prism: 2 multiplied by length multiplied by width plus 2 multiplied by length multiplied by height plus 2 multiplied by width multiplied by height
Surface area of a cylinder: 2 multiplied by pi multiplied by radius multiplied by height plus 2 multiplied by pi multiplied by radius squared
Pythagorean Thereoum: base squared plus length squared equals hypotenuse squared
Rational numbers: includes whole numbers, integers, positive and negative fractions, decimals as well as repeating decimals
Irrational numbers: numbers that cannot be written as a fraction
Use PEDMAS in all equations. It is the order that you should be solving the problem.
PEDMAS: parentheses, exponents, division and multiplication (from left to right), addition and subtraction (from left to right)
A number divided by itself equals one.
All whole numbers have a power of one.
Any number divided by 0 is undefined since anything times zero would never equal anything but zero.
ex. 5 Ă· 0 = undefined since 0 x 5 can never = 5
0 divided by any number is 0.
ex. 0 Ă· 5 = 0 since 0 x 5 = 0
When dividing or multiplying by a negative to solve an equation, you must flip the inequality sign.
Scale factor: diagram divided by original
Area of a circle: pi multiplied by radius squared
Circumference of a circle: pi multiplied by diameter or 2 multiplied by pi multiplied by radius
Area of a triangle: base of triangle multiplied by height of triangle divided by two
Surface area of a cube: 6 multiplied by a side squared
Surface are of a rectangular prism: 2 multiplied by length multiplied by width plus 2 multiplied by length multiplied by height plus 2 multiplied by width multiplied by height
Surface area of a cylinder: 2 multiplied by pi multiplied by radius multiplied by height plus 2 multiplied by pi multiplied by radius squared
Pythagorean Thereoum: base squared plus length squared equals hypotenuse squared
Rational numbers: includes whole numbers, integers, positive and negative fractions, decimals as well as repeating decimals
Irrational numbers: numbers that cannot be written as a fraction
Use PEDMAS in all equations. It is the order that you should be solving the problem.
PEDMAS: parentheses, exponents, division and multiplication (from left to right), addition and subtraction (from left to right)
A number divided by itself equals one.
All whole numbers have a power of one.
Any number divided by 0 is undefined since anything times zero would never equal anything but zero.
ex. 5 Ă· 0 = undefined since 0 x 5 can never = 5
0 divided by any number is 0.
ex. 0 Ă· 5 = 0 since 0 x 5 = 0
When dividing or multiplying by a negative to solve an equation, you must flip the inequality sign.
Scale factor: diagram divided by original