Determine the area of a circular plot in acres.
A = πR² ÷ 43560 (there are 43560 ft² in one acre)
where A = area R = radius π = 3.14159
the diameter of the plot is 66 feet
66 ÷ 2 = 33 ft for the radius 3.14159 * 33 * 33 ÷ 43560 = 0.0785398
The plot has an area of 0.0785 acres
In a fraction:
1 ÷ 0.07853975
1 : 12.7 of an acre