Area of a circle = Pi x diameter2/4 = 3.142 x 36/4 = 28.28 sq ins
(6 pi) inches.
28.3
You can multiply them as mixed fractions, or convert both to inches, then divide by 144 (sq in / sq ft). 9 ft = 108 in, add 7 in = 115 in. 3 ft = 36 in, add 6 in = 42 in. Multiply (115 in) x (42 in) = 4830 sq in. Divide by 144 (sq in/sq ft) = 33.541667 sq ft.
6 inches
If the area of a circle is about 28 square inches the diameter of the circle is: about 6 inches (5.971).
There are approx 4071.5 square inches.
Assuming that 12" round means a circle with a circumference of 12", its radius would be 12/(2*pi) = 6/pi inches. Its area would, therefore, be pi*(6/pi)2 = 36/pi sq inches. In terms of sq mm, that is 7393 sq mm (to 4 sig figs).
Area of a circle = Pi x diameter2/4 = 3.142 x 36/4 = 28.28 sq ins
6 inches across
36 sq inches.
9*6 = 54 sq inches
(6 pi) inches.
6 inches across
30 inches x 72 inches = 2.5 ft * 6 ft = 15 sq ft.30 inches x 72 inches = 2.5 ft * 6 ft = 15 sq ft.30 inches x 72 inches = 2.5 ft * 6 ft = 15 sq ft.30 inches x 72 inches = 2.5 ft * 6 ft = 15 sq ft.
28.3
A=pi X radius squared 3.14 X 9=28.26 sq. inches