28.26 divided by 3.14 is equal to 9.
314
12.0769
100
0.6369
3.1847
285.4545
0.3185
7.4762
7.8344
20.16
1.7038
the formula for the area of a circle is pi times r squared (sorry this website does not work today for presenting this better) so 2826 = pi times r squared so dividing through on both sides bi pi gives you: 2826 divided by pi = r squared so r is the square root of (2826/ pi) 2826/pi = 899.5437384 so r is the square root of 899.5437384 = 29.99239468 r = 29.99 (to 2 decimal places)