SOLUTION: Find the radius of a circle with these three points: (-11,12),(-7,14),(-2,9).It also lists the center which is (-7,9).

Algebra ->  Circles -> SOLUTION: Find the radius of a circle with these three points: (-11,12),(-7,14),(-2,9).It also lists the center which is (-7,9).      Log On


   



Question 376202: Find the radius of a circle with these three points: (-11,12),(-7,14),(-2,9).It also lists the center which is (-7,9).
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Find the distance from any of the points to the center, each of those distances is equal to the radius.
Use the distance formula.
D%5E2=%28x%5B2%5D-x%5B1%5D%29%5E2%2B%28y%5B2%5D-y%5B1%5D%29%5E2
D%5E2=%28x%2B7%29%5E2%2B%28y%5B2%5D-9%29%5E2