21.98
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To find the circumference of a circle when the diameter is given, you can use the formula C = πd, where C is the circumference, π is pi (approximately 3.14159), and d is the diameter of the circle. In this case, the diameter is 6.8, so you would plug that into the formula: C = π(6.8) ≈ 21.41. Therefore, the circumference of the circle is approximately 21.41 units.
The circumference of a 7 feet diameter circle is: about 21.99 feet.You can easily to this calculation for other circles by multiplying the diameter by Pi (about 3.1416). The result is the circle's diameter.
The circumference of a 7 cm circle is: 21.99 cm(diameter x pi = circumference).
The circumference of a 7-foot diameter circle using 3.14 for Pi is: 21.98 feet (diameter x Pi = circumference).
Circumference = 7*pi which is about 22 inches