Mathematics formula

Main Idea (paragraph)

It is usually in the first or last sentence of the paragraph.

Perimeter

Distance around an object / add all the sides

Simple Interest

P(money) R(%) T(years)

Percent Change

(Original - new) / original

Percent Increase / Decrease

X2 - X1 / original

Percentage

what interest me / total

Time

distance / velocity

Distance

Velocity • time

Velocity

Distance / time

Slope

y2 - y1 / x2 - x1

Volume of a cylinder

πr²h

cube

V = s•s•s or s³

SA = 6s²

Cathetus = leg

√hyp² - leg²

Hypotenuse

√Leg² + leg²

Circumstances

2πr

Circumstances of a Area

πr²

Area of a Trapezoid

(b1 + b2)h / 2

Area of a Triangle

b•h / 2

Rectangle

p = add all sides or 2(L+w)

A = L • w

Celsius to Fahrenheit

F = 9/5C + 32

Fahrenheit to Celsius

C = 5/9 (f-32)

Reciprocals

Flip

Greater than

Less than

Greater than or equal to

Less than or equal to

Horizontal Line

Vertical Line

X less/minus y

x - y

x less than/subtracted from y

y - x

Quadratic Formula

Square

p = add all sides

A = b•h

Parallelogram

P = add all sides or 2(a+b)

A = b•h

Equilateral Triangle

Has 3 equal sides

Isosceles Triangle

Has 2 equal sides

Triangle sum theorem

<a + <b + <c = 180

Diameter

2r

Radius

d/2

Rectangular solid

V = L•w•h

SA = 2(L•w) + 2(w•h) + 2(h•L)

Cylinder

V = πr²h

SA = 2πrh + 2πrh

Complementary angle

Add up to 90

Supplementary angle

Add up to 180

Distance formula

√(x2 - x1)² +(y2 - y1)²