Area of triangle
A=1/2timesbtimesh
Area of a parallelogram
A=btimesh
Area of a trapezoid
A=base1+base2dividedby2timestheheight
circle
A=piersquared
circumfrence
C=2pier
cylinder volume
V=piersquaredtimesh
Distance formula
D=(x2-x1)squared)minus(y2-y1squared)allrooted
midpoint formula
(x,y)=(x1+x2/2,y1+y2/2)
slope form
y-y1=m(x-x1)