In order to do this, you must have the radius in feet.
-- Square the radius (multiply it by itself)
-- Multiply the answer by 'pi'. (3.142 is close enough)
-- The answer is the area of the circle, in square feet.
pi x radius2
Use the formula for the area of a circle: area = pi x radius2. Then convert square miles to acres.
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
area circle = π × radius² = π × (400 miles)² = 160000π sq mi ≈ 502655 sq mi
Since there are 640 acres in one square mile, divide acres by 640 to get square miles. In this case: 5.88/640 = 0.0091875 square miles.
You cannot convert a length measure like kilometers in an area measure of square miles.
Square feet are square feet. There is not a measure called radius square feet.
divide the square feet by pi that gives you the radius squared find the square root and get the radius
square miles and radius have different units
The radius of a circle with an area of 1,808.64 square miles is: about 24 miles (23.994 miles).
To convert square miles to square feet, multiply the number of miles by 27878400
You can't convert miles to square miles. Miles measure distance, while square miles measure area.
Radius is the square root of 1808.64/pi = about 24 miles
To convert from square miles to sq kms, multiply by 2.59.
If the surface area of the moon is 14,650 square miles then its radius would be 34.144 miles.
A circle that encloses 1,100 square miles of area has a radius of 18.712 miles .
You can't convert that.
Radius = 4.068 miles (to 3 dp)