Although "diameter" usually refers to circular objects, if we define it as "a straight line passing from side to side through the center of a figure," then the distance in this case would be 3 meters.
It's more likely that you meant to ask about the perimeter, which is the distance around, which is 12 meters.
Diameter = 84 in Radius = 42 in = 3.5 feet Area of circle = pi x r x r = 3.1415 x 3.5 x 3.5 =38.483 square feet
Diameter = 17 inches Radius = 8.5 inches Are of circle = pi x r x r = 3.1415 x 8.5 x 8.5 = 226.97 square inches
Area of a circle is PI times the square of the radius (half the diameter). 3.1415 x (7.5 squared) = about 176.7 square feet
pi x square of radius gives area. 3.14 x 100 = 314 sqft.
area of circle having diameter of 8.3 units = 4.15 x 4.15 x 3.1416 = 54.1 square units (approx)
The question is meaningless. 10 m x 3 m x 6 m = 180 cubic metres. It cannot equal any number of square metres.
Diameter X 3.14159265 divided by 4 X diameter X diameter. 2 * 3.14159265 / 4 * 2 * 2 = 6.2831853 square inches
if the diameter is in feet then multiply the diameter by pi 38 x 3.14159 = 119.38042 square feet if the diameter is in inches then dividethe inches by 12 then multiply the diameter by pi 38 ÷ 12 = 3.16666 x by 3.14159 = 9.94835 square feet
Area of a circle = (1/4) x (pi) x (square of the diameter)
Area of a circle = (1/2 x diameter)2 x piArea of a 24 inch diameter circle:(12 inches)2 x 3.1416 = 144 square inches x 3.1416 = 452.4 square inches
Diameter = 84 in Radius = 42 in = 3.5 feet Area of circle = pi x r x r = 3.1415 x 3.5 x 3.5 =38.483 square feet
3 x 5 x 12 = 15 x 12 = 180
Diameter = 17 inches Radius = 8.5 inches Are of circle = pi x r x r = 3.1415 x 8.5 x 8.5 = 226.97 square inches
3.14 x (r x r) 9 foot diameter circle
Area = pi * r*r If the diameter is 3, then the radius is 3/2 = 1.5 Area = pi * 1.5 * 1.5 = pi * 2.25 = 7.06858 to 5 decimal places
One such diameter can be 10 linear units. Diameter = 10 units. Area = 78.54 square units (= Pi/4 x d2 = Pi x 25).
Diameter of a circle is pi times the square of its radius. For a circle having a diameter of 7 mm, area = pi (3.1416) x 3.5 mm x 3.5 mm = 38.5 square millimeters.