2007-06-09 18:38:48 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The formula for the area of a circle is
A = π r^2
a semicircle is half a circle, so we divide by 2, same as multiplying by 0.5, so we get
A = 0.5 π r ^2
A = 3.1416 * (27)^2
A = 1145ft
2007-06-09 18:43:08 · answer #1 · answered by driftaddict87 4 · 0⤊ 0⤋
Area = (1/2) x Ï x 27² ft²
Area = 1145 ft² (to nearest whole number)
2007-06-10 14:48:09 · answer #2 · answered by Como 7 · 0⤊ 0⤋
The answer is 1145.5713 sqare feet.
Reason:-
Area of a complete circle = Ï x r^2
Area of a semi circle = (Ï x r^2)/2
= [3.14 x (27)^2] /2
= [3.14 x 729] /2
= 2289.06 / 2
= 1145.5713 sq feet
2007-06-10 02:26:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋
1145
2007-06-10 01:51:14 · answer #4 · answered by Luciana 2 · 0⤊ 0⤋