circumference= pi(3.14) by the diameter. if your given the radius, double the radius and times by pi.
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The circumference of a 6-inch circle is: 18.85 inches.
The circumference of a 42-inch diameter circle is: ~131.95 inches.
The circumference of a 10 inch circle is: 31.416 inches(circumference = diameter x pi).
To find the diameter of a circle with a 3-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 given circumference of 3 inches, the formula becomes 3 = πd. Solving for d, you get d ≈ 0.955 inches. Therefore, the diameter of a circle with a 3-inch circumference is approximately 0.955 inches.
The circumference of 9 inch diameter circle is about 28.27 inches.