Area of a triangle base X height / 2
L to ml 1 to 1000
area of a circle radius known pie * radius(squared)
area of a circle diameter known 1/4 * pie*diameter(squared)
Volume of a cylinder V = pie*radius(squared)*Height
Volume of a solid rectangle V= L*W*H
tons to pounds 1 to 2000
pounds to tons 1 to .0005