Answer:
d = 80
Step-by-step explanation:
The equation for circumference is 2 × pi × r.
Therefore, we can write the equation 2 × pi × r = 251.2
Divide by 2 on both sides. pi × r = 125.6
Since we are using 3.14 for pi, divide both sides by 3.14. r = 40.
We are finding the diameter, which is double the radius. 2r = d. 2(40) = 80.
