Question

7. Find the circumcenter of triangle ABC. (0, -1) (0, -3) (-4, -1) (-4, -3)

Answer 1

The circumcenter of a triangle is the point where the perpendicular bisectors of the sides intersect.
from the graph, we can see that the perpendicular bisector of BC is the y axis, x=0, the perpendicular bisector of AC is y=-3, so the circumcenter is (0,-3)