You need to qualify the 30 inches. Is it the diameter or circumference of a circle?
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Diameter = 30/pi inches
The area of a circle when the diameter is 30 inches is: 706.9 square inches.
The area of a circle is pi × r2. pi = 3.141592653589793 5 feet = 60 inches. The radius is half the diameter so the radius is 30 inches. If you plug 30 inches into the formula you get the answer of 2827.4333882308138 inches for the area of the circle.
The diameter of a circle is the distance across the circle passing through its center. In this case, the diameter of a 30-inch circle would be 30 inches. It is important to note that the diameter is always twice the length of the radius, which is the distance from the center to any point on the circle's edge.
1.27 inches To find diameter (width of a circle): C = 3.14159 (pi) * diameter 4 = 3.14159 * d d= 1.27 inches