What is the square footage of a circle 21 ft in diameter?
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try typing "10.5 times 10.5 times pi" into google.\n\nYou get \n\n10.5 times 10.5 times pi = 346.36059
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20.408941666666663 or 20 feet and 4 inches
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The radius would be 12, since the circle extends all around the firetower. So it would 144 times pi (3.14159) which comes to 452.38 miles.
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The formula for the circumference of a circle = pi x diameter.\n\nYou may have a value for pi like 3.142 .......(this is the one I remember)\n\nYou can tell by looking at the answers, that the answer is approx 21  (rather more than 3 x a tiny bit less than 7)\n\nAt some stage during the lesson that preceded this homework, there must have been a discussion about the appropriate number of decimal places to use.\n\nThe diameter of the circle was measured at some time.  It was given as 6.94 cm.  The measurement was considered good to 2 decimal places.  The value of the circumference is based on a calculation using this measurement to 2 dec pl, so the answer is good to 2 dec pl  = 21.80\n\nThe difference between 21.8 and 21.80 is precision.  The extra place of decimals shows greater precision.\n\nSome people know the value of pi to twenty decimal places.  You may multiply the value of the diameter by pi to 20 pl of decimals.  The answer has no meaning beyond the 2 places of decimals used when the diameter was measured.
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Area = length times width\nA = L time W\nReplace L with 32 and W with 22\nA = 32 times 22\nA = 704 square feet
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Area of a circle = pi * r^2\n= pi * 118^2  <--take half of 236 mm to find the radius\n= 43744 mm^2\n\nArea of a square = s^2\n43744 = s^2\ns = 209 mm\n\nSo your square has to have sides of 209 mm if it will have the same area as the circle above.
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Area = pi times radius squared, so divide the diameter by 2 and go from there
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Divide the circumference of a circle its diameter.
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You need to work out the cross sections - which is bigger\n\ncross section is the area of the circle\n\n= pi times the radius squared\n\nwhat is bigger 2 pipes\n\n2 x 3.142 x 0.001^2\n\nor\n\n1 pipe\n\n3.142 x 0.002^2\n\nI get \n2 pipes = 6.284E-06\n1 pipes = 1.257E-05 therefore approx twice as much
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43,560 square feet.  That's a square of about 209 feet on each side.
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Area of Semicircle = (PI * R * R)/2\n\nAns. = 2.262 sq. cm
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93.5 sq in\nMultiply by 2.54^2 to get\n603.2246 sq cm
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1.302433 e+007 sq.ft.\n\nor 13,024,330 sq. ft.
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36.65 sq ft = 36 sq ft + 93.6 sq in\n\nYou multiply 0.65 sq ft x 144 to get sq in, because as you already used it, 144 sq in = 1 sq ft
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The official size of the rink is 200 feet long and 85 feet wide. The corners are rounded in the arc of a circle having a radius of 28 feet.
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Measure the diameter and multiply by pi (3.1415)
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Conversion Factors and FormulasOne square meter equals: 1550 square inches: 10.7639 square feet: 1.19599 square yards; One square centimeter equals .155 square inch; One square millimeter ...\nwww.ookingdom.com/metric/factors - 17k - Cached - Similar pages