Respuesta :

1. circumference

2. diameter

3. radius

4. diameter

Step-by-step explanation:

  • Step 1: Find length of circumference and diameter of a circle.
  • Step 2: Divide the circumference with the diameter to get the ratio equal to π

π = c/d

  • Step 3: Rearrange the equation to get c = πd and substitute 2r for diameter.