Triangle Divided by Parallel Lines to Form Proportionate Triangles Small 320×100 Medium 640×200 Large 1024×320 Download Tiff Original 2400×750 | (107.5 KB) Description Illustration to show that if a line is drawn through two sides of a triangle parallel to the third side, it divides those sides proportionally. Keywords divide proportionally, parallel lines, proportion, proportionate, proportions, triangle Galleries Proportions Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 142
