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Formulas and Tricks
Math
15
Mathematics
Graduate
11/09/2013
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Term
Triangle Angles: 45-45-90
 Definition
Equiv. Sides: 1-1-√2
Term
Triangle Angles: 30-60-90
 Definition
Equiv. Sides: 1-√3-2
Term
Triangle Area
 Definition
(1/2)(base)(height)
Term
Circle Area
 Definition
πr^2
Term
Square Area
 Definition
a^2
Term
Circumference
 Definition
2πr^2
Term
Probability
 Definition
# desired/# possible
Term
Quadratic Equation
 Definition
x=(-b+/-sqrt(b^2-4ac))/(2a).
Term
Volume
 Definition
lwh
Term
Surface Area
 Definition
2(lw)+2(wh)+2(lh)
Term
Slope Intercept
 Definition
y=mx+b
Term
Right Triangle Side Multiples
 Definition
3:4:5
5:12:13
Term
Distance Formula
 Definition
rate x time
Term
Gross Profit
 Definition
Revenue-Cost
Term
Combinations Formula
 Definition
_nC_k=(n; k)=(n!)/(k!(n-k)!)
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