Circle With a Perpendicular Drawn to the Diameter Small 320×269 Medium 640×537 Large 1024×860 Download Tiff Original 2400×2015 | (197.4 KB) Description "If from any point on the circumference of a circle, a perpendicular be let fall upon a given diameter, this perpendicular will be a mean proportional between the two parts into which it divides the diameter." Keywords circle, circles, diameter, mean proportional, proportion, proportionate Galleries Circles Source: International Correspondence Schools I.C.S. Reference Library Mathematics (Scranton: International Textbook Company, 1905) Geometry & Trigonometry Pg. 18