2006-07-02 19:05:17 · 7 answers · asked by scifuntubes 3 in Science & Mathematics ➔ Mathematics
81*pi square feet, or roughly 254.5 square feet.
2006-07-02 19:11:58 · answer #1 · answered by anonymous 7 · 0⤊ 0⤋
The area of a circle is pi*r^2. Here, r is 9 ft (1/2 the diameter). That makes r^2 equal to 81. Multiply by pi (approx 3.1416) and your answer is 254.47 sq ft.
2006-07-02 19:13:14 · answer #2 · answered by aiki.biker 2 · 0⤊ 0⤋
Pi R squared = 254.469 sq. ft.
pi = 3.14159...
R = 18/2 = 9
R*R = 81
3.14159 * 81 = 254.469 sq. ft
2006-07-02 21:32:01 · answer #3 · answered by Lee J 4 · 0⤊ 0⤋
Area = Pi (d^2)/4
A = Pi((18^2)/4)
A = (324/4)pi
A = 81pi
A = about 254.469ft^2
2006-07-03 05:16:18 · answer #4 · answered by Sherman81 6 · 0⤊ 0⤋
given:
d = 18 ft
YOu will find:
A = ____ ft²
Formulae:
r = d/2
A = pi r²
r = 18 ft/2
r = 9 ft
A = pi r²
A = pi(9 ft)²
A = 81 pi ft² or 254.47 ft²
^_^
2006-07-03 00:22:55 · answer #5 · answered by kevin! 5 · 0⤊ 0⤋
multiply pi by the radius of the circle squared. 81 * 3.1416 will give you the answer. or square the diameter and multiply by.7854. should give you the same answer
2006-07-02 19:18:57 · answer #6 · answered by Anonymous · 0⤊ 0⤋
254.34
2014-08-15 09:48:27 · answer #7 · answered by Robert 1 · 0⤊ 0⤋