Using the mid-point concept, we have that:
The mid-point between two points is the halfway point between them, and is found using the mean of the coordinates.
The center of the circle is the mid-point of the coordinates of the diameter, hence:
The radius is the distance between the center and the end-points of the diameter, hence, applying the formula for the distance between two points:
[tex]r = \sqrt{(5 - 2)^2 + (8 - 7)^2} = \sqrt{10} = 3.16[/tex]
More can be learned about the mid-point concept at https://brainly.com/question/10956693
#SPJ1
