SOLUTION: 19: Find the circumference of a circle with a diameter of 10. 20: Find the radius of a circle with circumference 4 sqrt(3)(pi). 21: Find the radius of a circle with are

Algebra ->  Circles -> SOLUTION: 19: Find the circumference of a circle with a diameter of 10. 20: Find the radius of a circle with circumference 4 sqrt(3)(pi). 21: Find the radius of a circle with are      Log On


   

Question 446118: 19: Find the circumference of a circle with a diameter of 10.

20: Find the radius of a circle with circumference 4 sqrt(3)(pi).

21: Find the radius of a circle with area (4/9) (pi).

22: What is the circumference of a circle with area 49(pi)?
Answer by richard1234(7193) About Me  (Show Source):
You can put this solution on YOUR website!
For each of these questions, use the formula C = pi*d, where d is the diameter. Note that by definition, the diameter is twice the radius, so d =2r.