Steel Square Small 320×243 Medium 640×486 Large 1024×778 Download Tiff Original 2400×1823 | (167.5 KB) Description Illustration of steel square. Keywords measure, measurement, right angle, steel square Galleries Miscellaneous Math Tools Source: Claude Irwin Palmer Library of Practical Electricity: Practical Mathematics For Home Study (New York: McGraw-Hill Book Company, Inc., 1919) 135
