Area Of Irregular Figures
Illustration of an irregular figure. To find area, divide round curved portions in small steps with dividers ; add in any straight pieces. “Divide into narrow strips; measure their mid-ordinates. Then - Area = aver. mid-ordinate X length.
GalleriesGeneral Geometric Illustrations
Albert A. Hopkins Scientific America: Handy Book Of Facts And Formulas (New York: Munn & Co., Inc., 1918) 47