Formulas

square	Area = side2
rectangle	Area = length × width
parallelogram	Area = base × height
triangle	Area = 1/2 × base × height
trapezoid	Area = 1/2 × (base1 + base2) × height
circle	Area = p × radius2; p is approximately equal to 3.14.

square	Perimeter = 4 × side
rectangle	Perimeter = 2 × length + 2 × width
triangle	Perimeter = side1 + side2 + side3

cube	Volume = edge3
rectangular solid	Volume = length × width × height
square pyramid	Volume = 1/3 × (base edge)2 × height
cylinder	Volume = p × radius2 × height; p is approximately equal to 3.14.
Cone	Volume = 1/3 × p × radius2 × height; p is approximately equal to 3.14.

COORDINATE GEOMETRY

distance between points = <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::;::/sites/dl/free/0809222329/45404/Formula1.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">; (1.0K)</a>; (x1, y1) and (x2, y2) are two points in a plane. slope of a line = <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::;::/sites/dl/free/0809222329/45404/Formula2.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">; (1.0K)</a>; (x1, y1) and (x2, y2) are two points on the line.

MEASURES OF CENTRAL TENDENCY

mean = <a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::,::/sites/dl/free/0809222329/45404/Formula3.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif">, (1.0K)</a>, where the x's are the values for which a mean is desired, and n is the total number of values for x. median = the middle value of an odd number of ordered scores, and halfway between the two middle values of an even number of ordered scores.