Final answer:
The radius of the DVD is 30mm, the circumference is 60π mm, and the diameter is 60 mm.
Step-by-step explanation:
The radius of the DVD can be calculated by half of the measure from the center to the edge. So, the radius would be 30mm. The circumference of the DVD can be found using the formula C = 2πr, where r is the radius. Plugging in the value, we get C = 2π(30) = 60π mm. The diameter of the DVD is simply twice the radius, so it would be 2(30) = 60 mm.