Question

which term best describes the point where the perpendicular bisectors of the three sides of a triangle intersect?

Answer 1

Explanation:

The perpendicular bisectors all intersect at the circumference's center. A diagram showing this happening is shown below. This is the tenth problem of Apollonius which states. Any 3 non linear points will determine the radius of the circumcircle and it's center.

So the answer you want is circumcenter.