The circumference of a circle is 15 meters. Determine the diameter. Use 3 for pie.

The circumference of a circle can be found by multiplying the diameter by pi (or in this case three). so if the circumference is 15, and you know pi is three, you can find the diameter by dividing 15 by 3 (because if 15=3x, the. 15/3=x). the diameter would be 5.