Question

Where is the circumcenter of any given triangle?
the point of concurrency of the altitudes of the triangle
the point of concurrency of the perpendicular bisectors of the sides of the triangle
the point of concurrency of the bisectors of the angles of the triangle
the point of concurrency of the medians of the triangle

Answer 1

Hint: check out this page

http://www.mathopenref.com/trianglecircumcenter.html

Answer 2

what do you get