Its diameter will be: 2*100 = 200 miles
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The radius of a circle is 1/2 of its diameter
The formula for the area of a circle is A = πr^2, where A is the area and r is the radius of the circle. To find the radius from the diameter, you divide the diameter by 2. So, for a circle with a diameter of 100, the radius would be 50. Plugging this into the formula, the area would be A = π(50)^2 = 2500π square units.
5.6433 ft radius or 11.2866 diameter
A circle with a radius of 50 mm has an area of 7853.98 square mm
2 meters