Final answer:
The radius of the circle formed by a bent plastic rod can be determined by using the formula for the circumference of a circle, which is C = 2πr, where C is the circumference and r is the radius.
Step-by-step explanation:
The radius of the circle formed by a bent plastic rod can be determined by using the formula for the circumference of a circle, which is given by C = 2πr, where C is the circumference and r is the radius.
Let's say the length of the plastic rod is L. Since the rod is bent into a circle, the circumference of the circle will be equal to the length of the rod, so C = L.
Therefore, to find the radius of the circle, we can rearrange the equation to solve for r:r = L / (2π).