How do you find the circumference of a circle when the diameter is 6.8?

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.