(pi = = 3.141592...)
Area Formulas
Note: "ab" means "a" multiplied by "b". "a2" means "a squared", which is the same as "a" times "a".Be careful!! Units count. Use the same units for all measurements. Examplessquare = a 2
rectangle = ab
parallelogram = bh
trapezoid = h/2 (b1 + b2)
circle = pi r 2
ellipse = pi r1 r2 ...
