What are the formulas for area 4 theses shapes: Parallelogram, Triangle, Rectangle, Square, Trapezoid, Circle?
Thats all.
parallelogram: area=b x h , b=length of base,h=height of perpendicular
triangle: area=1/2 a x b, a=length of base, length of perpendicular
rectangle: area=l x w,l=length ,w=width
square: area=(one side)^2
trapezoid: area=1/2(b1+b2) x h, b1=one base,b2=2nd base,h=height of perpendicular
circle: area=pi r^2 , pi=constant=22/7,r=radius of circle