| Michael Walsh - Arithmetic - 1831 - 336 pages
...inches diameter, «nd one inch deep, what is its content in ale gallons? 45X43=2025 1 =5,64 gallons. 359 **If the square of the diameter of any circle be multiplied by** ,7854 the product is the area. EXAMPLE. If the diameter of a circle be 45 inches, what is the area?... | |
| Michael Walsh - Arithmetic - 1838 - 327 pages
...inches diameter, and one inch deep, what is its content in ale gallons? 45X45=2025 =5,64 gallons. 359 **If the square of the diameter of any circle be multiplied by** ,7854 the product is the area. EXAMPLE. If the diameter of a circle be 45 inches, what is the area?... | |
| James Robinson (Jr.) - Arithmetic - 1850 - 288 pages
...square pjf the diameter X by one fourth of 3. 14 16 = the area. And 3.141.6 X .! or .85 = .7854 ; hence, **if the square of the diameter of any circle be multiplied by** .7854, the product will be the area. And 1 -;- .7854 = 1 .2732 ; hence, if the square of the diameter... | |
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