Ferg Loves Puzzles #9

 Mr FERG has a son, who loves his car. He can often be seen hooning around the paddocks of the FERG residence. One day Mr Ferg woke up to find what he thought were crop circles in his yard. He measured them as he was of the opinion that he needed more tin foil on his roof, and inside his hat. These distances were as follows.

Puzzle one - has a radius of 1,505.70mtr

Puzzle four - has a radius of 1,634.78mtr

Puzzle nine - has a radius of 1,319.43mtr

You can check your answers for this puzzle on GeoChecker.com.