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ACT Formula Sheet
Mathematical formula sheet
16
Mathematics
11th Grade
12/09/2013
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Cards

Term
Distance Formula
 Definition
d = √(x2 - x1 )2 + (y2 - y1 )2
Term
Midpoint Formula
 Definition
(x1 +x2 / 2 , y1 + y2 / 2)
Term
Slope Formula
 Definition
rise / run = y2 - y1 / x2 - x1
Term
Slope intercept form
 Definition
y=mx+b
Term
Parallel lines have _______ slopes.
 Definition
Same
Term
Perpendicular lines have ________ slope.
 Definition
Opposite Sign Perpendicular Slope
Term
Pythagorean Theorem
 Definition
A2 + B2 = C2 
Term
Area of a Triangle
 Definition
1/2 face x height
Term

Sin

SOH

 Definition
Opposite/Hypothesis
Term

Cos

CAH

 Definition
Adjacent / Hypothesis
Term

Tan

TOA

 Definition
Opposite / Adjacent
Term
Area of a circle
 Definition
Pi x radius2
Term
Circumfrence of a Circle
 Definition

Pi x Diameter

 

or

 

2 x Pi x radius
Term
Area of a rectangle
 Definition
Length x Width
Term
Area of a trapezoid
 Definition
1/2 (b1 + b2 ) h
Term
Rectangular Volume
 Definition
Length x Width x Height
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