pi square miles.
The radius is half the diameter so the radius is ALWAYS half the diameter. Just because a number is odd doesn't mean you can't take half of it. For example if a diameter is 5 miles, then the radius is 2.5 miles.
103,000 square kilometers = 39,768.5 square miles.
Alameda County has about 738 square miles of area.
20 nautical miles
24 miles
If you have a circular area with a 50-mile radius, the area of the circle is approximately 7,854 square miles (rounded).
A circular area of 5 miles radius covers 50265.5 acres(to 1 dp) Area = pi*radius2, which with radius in miles will give you area as 78.53982 square miles, then multiply by 640, since there are 640 acres in 1 square mile.
Radius is the square root of 1808.64/pi = about 24 miles
To convert radius miles into square miles, you would need to use the formula for the area of a circle: A = πr^2, where r is the radius. Square the radius value, then multiply it by π (approximately 3.14) to get the area in square miles.
A circle that encloses 1,100 square miles of area has a radius of 18.712 miles .
If the surface area of the moon is 14,650 square miles then its radius would be 34.144 miles.
Area, A, of a circle: A = (pi)r^2 r^2 = A/pi r = √(A/pi) r = √(1808.64/pi) r ≈ 23.9939 miles * so i would round it up and it would be 24miles * You can round the answer up to 24, but a radius 24 is not so close to the area which is 1808.64. Check: (pi)24^2 ≈ 1809.56, and (pi)23.9939^2 ≈ 1808.64
The area of a circle with a 6-mile radius is approximately 113 square miles.
Radius = 4.068 miles (to 3 dp)
A circle with a radius of seven miles has an area of ~153.938 square miles.
This is the area of a circle with a radius of 100 miles →area = π × radius² = π × (100 miles)² = 10,000π sq miles ≈ 31416 sq miles