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The circumference of a circle 30 inches in diameter is 30*pi inches
The circumference of a circle with diameter of 30 centimeters is: 94.2 cm (diameter x Pi = circumference).
The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units. The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units. The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units. The circumference of a circle with a diameter of 30 units of length is pi*30 = 94.2 units.
Multiply Pi (3.1416) by the diameter. Thus, 3.1416 x 30 = 94.248in
The diameter of a circle is the distance across it, passing through the center. If the diameter is 30 cm, that means the full width of the circle from one edge to the opposite edge is 30 cm. Therefore, the diameter is simply 30 cm.