Oblique Triangle for Distance Across a River Small 320×217 Medium 640×434 Large 1024×694 Download Tiff Original 2400×1627 | (307.6 KB) Description Illustration of oblique triangle used to find distance across a river. Keywords Distance, Lake, law of cosines, law of sines, proportion, proportions, river, stream, triangle, triangles, trig, trigonometry Galleries Trigonometry: Triangles Source: Claude Irwin Palmer Library of Practical Electricity: Practical Mathematics For Home Study (New York: McGraw-Hill Book Company, Inc., 1919) 465
