A hand book of general instruction for mechanics, containing useful rules and memoranda for practical men (1907)
Smith, Franklin Elijah, 1872- · New York, D. Van Nostrand company · leaf 199
ircumference of an Ellipse Rule. Multiply 3.1416 by half the sum of the twodiameters. Example. What is the circumference of an ellipsewhose diameters are 6 and 4 inches? 6 ^4 2)10 5 X 3.1416 = 15.7080 inches. Arts. Example. What is the circumference of an ellipsewhose diameters are 3| and 7J? 3i =… … Example. What is the area of an ellipse whosediameters are 3| and 4j inches? (Fig. 4.) 3J = 3.5 .7854 4± = 4.5 15.75 175 39270 140 54978 Product 15.75 39270 7854 12.370050 square inches. Ans. What is the area of an ellipse whose diameters are 5 and 10 inches? * 5 .7854 10 50 50 39.2700 square…
Mechanics · Arithmetic · Measurement
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