Area

KEY

b = base h = height l = length w = width = slant height S.A. = Surface area

d= diameter r = radius A = area C = circumference V = volume

Use 3.14 or 22/7 for p

Triangle

A = 1/2 bh

Rectangle

A = lw

Trapezoid

A = 1/2 h(b₁ + b₂)

Parallelogram

A = bh

Circumference
C = pd = 2pr

Circle

A = pr²

		Volume	Total Surface Area
	Right Circular Cone	V = 1/3 pr^2h	S.A. = 1/2 (2pr) + pr^2 = pr + pr^2
	Square Pyramid	V = 1/3 lwh	S.A. = 4(1/2 l) + l^2 = 2l + l^2
	Sphere	V = 4/3 pr^3	S.A. = 4pr^2
	Right Circular Cylinder	V = pr^2h	S.A. = 2prh + 2pr^2
	Rectangular Solid	V = lwh	S.A. = 2(lw) + 2(hw) + 2(lh)

In the following formulas, n represents the number of sides.

In a polygon, the sum of the measures of the interior angles is equal to 180(n - 2).

In a regular polygon, the measure of an interior angle is equal to [180(n - 2)] / n.

Pythagorean theorem: c^2 = a^2 + b^2	Distance between two points P1(x1,y1) and P2 (x2,y2):
y = mx + b Slope-intercept form of an equation of a line, where m = slope and b = the y-intercept:	Midpoint between two points P1(x1,y1) and P2 (x2,y2):
d = rt Distance, rate, time formula, where d = distance, r = rate, t = time.	I = prt Simple interest formula, where p = principal, r = rate, t = time.

Conversions
1 yard = 3 feet = 36 inches 1 mile = 1,760 yards = 5,280 feet 1 acre = 43,560 square feet 1 hour = 60 minutes 1 minute = 60 seconds	1 cup = 8 fluid ounces 1 pint = 2 cups 1 quart = 2 pints 1 gallon = 4 quarts
1 liter = 1000 milliliters = 1000 cubic centimeters 1 meter = 100 centimeters = 1000 millimeters 1 kilometer = 1000 meters 1 gram = 1000 milligrams 1 kilogram = 1000 grams	1 pound = 16 ounces 1 ton = 2,000 pounds
Metric numbers with four digits are represented without a comma (e.g., 9960 kilometers). For metric number greater than four digits, a space is used instead of a comma (e.g., 12 500 liters).