If the diameter of a circle is 12 inches the circumference is: 37.7 inches (diameter x Pi = circumference).
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If the diameter of a circle is 12 inches the circumference is: 37.7 inches (diameter x pi = circumference).
The circumference of a circle is given by Circumference = pi x diameter. The area of a circle is given by Area = pi/4 x diameter2. Thus for a circle with circumference c = 12 in. The area will equal a = 11.459 in2.
To find the diameter of a circle with a 36-inch circumference, you can use the formula C = πd, where C is the circumference, π is pi (approximately 3.14159), and d is the diameter. Plugging in the values, we get 36 = 3.14159 * d. Solving for d, we find that the diameter is approximately 11.46 inches.
circumference = π x diameter ⇒ diameter = circumference ÷ π = 12 cm ÷ π ~= 3.8 cm
The approximate area of a circle with a 12-inch diameter is: 113 square inches.