Answer:
2πr=c, Perimeter, or Circumference is what we are looking for, and this is the formula.
so we need to figure out 2 x 3.14 x radius:1.7 = Perimeter or Circumference
2 x 3.14 = 6.28
6.28 x 1.7 = 10.28
P.S. answer is 10.7, my answer is simplified.
~Hope this helps~