 | 1928 - 322 pages
...because we have not used special values to develop the formula. As a lad in the district school I learned "To find the area of a circle, multiply the square of the radius by 3.1416," or to find the volume of a sphere "multiply the cube of the diameter by .5236," or further,... | |
 | Franklin Sherman Hoyte, Harriet E. Peet - Arithmetic - 1927 - 440 pages
...computations, it has been found that the square of the radius can be fitted into a circle about 3y times, or, more exactly, 3.1416 times. To find the...of a circle, multiply the square of the radius by TT. The square of a number is found by multiplying the number by itself. To indicate that a number... | |
 | Harry De Witt De Groat, Sidney Grant Firman, William A. Smith - Arithmetic - 1926 - 368 pages
...Multiply the square of the 567 radius by it. " = 12,474 The area of the pool is 12,474 sq. ft. Remember : To find the area of a circle, multiply the square of the radius by xFind the area of a circle whose radius is : 1. 7 ft. 3. 3 ft. 6 in. 5. 23 in. 7. 5 ft. 2. 42 in. 4.... | |
 | Education - 1885 - 612 pages
...experiment that .7854+ is that number. 1600 X .7854= 1246+, the area of the circle. Hence the rule — To find the area of a circle multiply the square of the diameter by .7854. 456 If an inside square is desired, connect the ends ol" the diameters with straight... | |
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To find the area of a circle, multiply the square of the diameter by .7854. 
