Final answer:
The equivalent formula for the circumference C = 270/π is r = 270 / (2π²)
Step-by-step explanation:
The circumference of a circle can be calculated using the formula C = 2πr or C = πd, where r is the radius and d is the diameter.
To find an equivalent formula for C = 270/π, we can substitute the value of C with 270/π. Since C = 2πr, the equivalent formula becomes 270/π = 2πr.
Dividing both sides of the equation by 2π gives us r = (270/π) / (2π).
Simplifying further, we get r = 270 / (2π²), which is an equivalent formula for the circumference when C = 270/π.