 | George John Craigen - Real property tax - 1911 - 146 pages
...tank, gasometer, etc. To find the cubic contents, multiply the area of the base by the height. FIG. 8. To find the area of a circle, multiply the square of the diameter by . 7854, or the square of the radius by 3.1416. To find circumference multiply diameter... | |
 | Silver manufacturing co., Salem, O. - Silage - 1911 - 258 pages
...CIRCUMFERENCES AND AREAS OF CIRCLES. To find the circumference of a circle, multiply the diameter by 3.1416. To find the area of a circle, multiply the square of the diameter by 0.7864. To find the cubical contents of a cylinder, multiply the area of the base (floor)... | |
 | Wisconsin. State Board of Health - Plumbing - 1916 - 156 pages
...gallons (approximately 7J gals.). To find the circumference of a circle multiply the diameter by 3.1416. To find the area of a circle multiply the square of the radius by 3.1416, or multiply the square of the diameter of the circle by 0.7854. To find the pressure in pounds... | |
 | Augustus Orloff Thomas - Agricultural mathematics - 1916 - 296 pages
...A. * To find the circumference of a circle. Multiply the diameter by 3.1416. FORMULA. — C = ird. To find the area of a circle. Multiply the square of the radius by 8.1416. FOBMULA. — A= irr1. Find the circumferences and the areas of circles having the following... | |
 | Samuel Raymond Eighinger, Mancius Smedes Hutton - Steam locomotives - 1916 - 378 pages
...rules, which will come in handy in working out the above or other examples, will be given. RULE 1. — To find the area of a circle multiply the square of the diameter by the constant .7854. RULE 2. — To find the circumference of a circle multiply the diameter... | |
 | Charles Ernest Chadsey, James Hamblin Smith - Arithmetic - 1917 - 326 pages
...circle is .7854 of a square with a side equal to the diameter. 18. From this fact we get the rule: To find the area of a circle multiply the square of the diameter by .7854. 19. Find the areas of circles 6 inches, 8 inches and 12 inches in diameter by this... | |
 | Charles Godfrey - Algebra - 1918 - 574 pages
...cuboid ie the product of the numbers of unite in its length, breadth and thickness. 2. To calculate the area of a circle, multiply the square of the radius by the number 3'14159... (represent tins number by ,). 3. The volume of a cylinder is obtained by multiplying... | |
 | Ludlum Steel Company - Tool-steel - 1918 - 174 pages
...§ *£ g ^ S* a * Is IT1I •ss 5I M > tU H s •? Is g •3 teu •s 111 1 1 a* USEFUL INFORMATION To find the area of a circle, multiply the square of the diameter by .7854. To find the area of an octagon, multiply the square of the diameter of the inscribed... | |
 | Franklin Sherman Hoyt, Harriet E. Peet - Arithmetic - 1920 - 386 pages
...more exactly the number of times the square of the radius can be fitted into the circle. OF RADIUS By careful measure-ments and computations, it has...exactly, 3.1416 times. To find the area of a circle, multip'y the square of the radius by ir. The square of a number is found by multiplying the number... | |
 | Eugene Henry Barker - Mathematics - 1920 - 264 pages
...successive values from 1 to 10 in the formula A = Exercise Express as formulas the following rules : 1. To find the area of a circle, multiply the square of the diameter by .7854. 2. To find the area of a sphere, multiply the square of the diameter by 3.1416.... | |
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To find the area of a circle, multiply the square of the diameter by .7854. 
