ACT Math formulas to remember

Area of triangle

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)