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ACT math formulas

QuestionAnswer
percentage fraction formula part/whole=x/100
standard linear equation y=mx+b or y=a+bx
slope formula change in y/ change in x or y2-y1/x2-x1
perimeter of a rectangle P=2l+2w
volume of rectangular prism l x w x h
circumference of a circle C=2(3.14)r
area of a circle A=(3.14)r^2
Pythagorean theorem a^2+b^2=c^2
sin length of opposite/ length of hypotenuse
tan length of opposite/ length of adjacent
cos length of adjacent/ length of hypotenuse
mean sum of all numbers/ number of numbers
probability number of desired outcomes/ total number of outcomes
mid point x1+x2/2 , y1+y2/2
length of a line segment (distance formula) L=sqr root (x2-x1)^2 + (y2-y1)^2
area of a triangle A=1/2bh
quadratic equation x= -b++-squrt b^2 - 4ac/ 2a
Equation of a circle (x-h)^2 + (y-k)^2=r^2
Created by: user-2030979
 

 



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