Respuesta :

9514 1404 393

Answer:

  3√2

Step-by-step explanation:

The length of the diameter is given by the distance formula:

  d = √((x2 -x1)² +(y2 -y1)²)

  d = √((2 -(-4))² +(8 -14)²) = √(36 +36) = 6√2

The radius is half the diameter, so the radius of your circle is 3√2.