The circumference of a circle with a diameter of 30 centimeters is: about 94.25 cm. You can easily do this calculation for other circles by multiplying the diameter by Pi (about 3.1416).
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Divide the circumference (38") by Pi (about 3.1416) to get the diameter in inches.
The area of a circle when the diameter is 30 inches is: 706.9 square inches.
an inch
categorized as an acute angle
Thirty pounds