There are 43,560 square feet in an acre.
There are 9 square feet in a square yard.
43,560 รท 9 = 4,840 square yards in an acre.
If you want a relatively square space, then the closest yardage would...
If the acre is a circle (and the use of the word 'circumference' implies this, the other word would be perimeter) then 1 acre = 4,840 square yards Area = pi times r2 A circle with an area of 1 acre...