Given:
Ï€
r, where r = radius of a circle
r = C / (
2
Ï€
)
Plug in C into formula:
r = (30 yards ) / (2
Ï€) = 15/
Ï€ yards
r =
15/
Ï€ yards ~=
4.775 yards
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The circumference of a circle with a diameter of 6 yards is 18.85 yards.
C = 43.98 yd to two decimal placesWhen the radius is known, the formula for circumference is:C = 2 x pi x rC = 2 x pi x 7 ydC = 43.98 yd to two decimal places
Diameter is twice the radius.
Easy. Multiply the diameter (8 yards) by Pi (about 3.1416). The result is the circle's circumference:8 x 3.1416 = 25.1328 yards circumference
30 ft. x 50 ft. = 1500 sq. ft. = 1500/9 sq. yd. = 166 2/3 sq. yd.