Acute Angle Theta Small 320×201 Medium 640×402 Large 1024×643 Download Tiff Original 2400×1506 | (132.1 KB) Description Illustration of acute angle theta as part of a right triangle. Keywords acute, Right Triangle, theta, trigonometric angle Galleries Trigonometry: Angles Source: Claude Irwin Palmer Library of Practical Electricity: Practical Mathematics For Home Study (New York: McGraw-Hill Book Company, Inc., 1919) 404
