Right Triangle Showing Pythagorean Theorem Small 307×320 Medium 614×640 Large 982×1024 Download Tiff Original 2301×2400 | (362.5 KB) Description Illustration of a right triangle that can be used to show Pythagorean theorem. "In any right triangle, the square described upon the hypotenuse is equal to the sum of the squares described upon the other two sides." Keywords pythagorean theorem, Right Triangle, triangles, triples Galleries Miscellaneous Triangles Source: International Correspondence Schools I.C.S. Reference Library Mathematics (Scranton: International Textbook Company, 1905) Geometry & Trigonometry Pg. 11 Courtesy the private collection of Roy Winkelman