Math Formulas
Exterior angles of a regular polygon add up to - 360
sum of interior angles of a polygon - (n-2)180
N- number of sides
if the polygon is regular and has n sides, then each exterior angle.. - = 360/n
If a polygon is "regular," what does that mean? - All angles are the same size and all sides are
the same length.
completing the square - (x+(b/2)^2 + c - (b/2)^2
Exponential decay - P(1-r/100) to the power of t
Area of a sector - x°/360 times (∏r²), where x is the degrees in the angle
Length of an arc - 2πr(xdegrees/360)
Exponentially infers - Compound interest
Real numbers - All rational and irrational numbers
Rational numbers - All positive and negative integers, fractions and decimal numbers.
Irrational numbers - Any real number which cant be expressed as a fraction of two integers
, Profit percentage - profit/cost price x 100
Loss percentage - loss/cost price x 100
Area of a circle - A=πr²
Perimeter of a circle - 2πr (circumference)
Area of a semicircle - A=½πr²
Perimeter of semicircle - P = ½ x pi x diameter + diameter
Total surface area for cylinder - 2πrh + 2πr²
Total surface area for cone - Pi x r (l + r)
Surface area of pyramid - Base area + area of the shapes on the sides
Volume of pyramid - 1/3 x area of base x height
Surface area of hemisphere - 2π r²
Volume of hemisphere - 2/3πr³
Corresponding angles - C shape
Exterior angles of a regular polygon add up to - 360
sum of interior angles of a polygon - (n-2)180
N- number of sides
if the polygon is regular and has n sides, then each exterior angle.. - = 360/n
If a polygon is "regular," what does that mean? - All angles are the same size and all sides are
the same length.
completing the square - (x+(b/2)^2 + c - (b/2)^2
Exponential decay - P(1-r/100) to the power of t
Area of a sector - x°/360 times (∏r²), where x is the degrees in the angle
Length of an arc - 2πr(xdegrees/360)
Exponentially infers - Compound interest
Real numbers - All rational and irrational numbers
Rational numbers - All positive and negative integers, fractions and decimal numbers.
Irrational numbers - Any real number which cant be expressed as a fraction of two integers
, Profit percentage - profit/cost price x 100
Loss percentage - loss/cost price x 100
Area of a circle - A=πr²
Perimeter of a circle - 2πr (circumference)
Area of a semicircle - A=½πr²
Perimeter of semicircle - P = ½ x pi x diameter + diameter
Total surface area for cylinder - 2πrh + 2πr²
Total surface area for cone - Pi x r (l + r)
Surface area of pyramid - Base area + area of the shapes on the sides
Volume of pyramid - 1/3 x area of base x height
Surface area of hemisphere - 2π r²
Volume of hemisphere - 2/3πr³
Corresponding angles - C shape
