pie multiplied by twenty five = 78.53981634
1. The diameter multiplied by pie. 2. The radius multiplied by 2 multiplied by pie. 3. The area divided by pie, the square root of that answer then multiplied by 2 then multiplied by pie.
approx 12.5664r
35.904pi or 112.79574...
5193.05265638
one half multiplied by four multiplied by pie multiplied by the radius squared
The formula is pi multiplied by the diameter
The diameter multiplied by (pi)2 . That's about 9.87 times the diameter.
3.14 multiplied by 21 is 65.94
circumference = pi multiplied by the diameter
No. 1/4 = 15/60 (both top and bottom of the fraction multiplied by 15). 25/60 is larger than 1/4 and not equal.
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0.48