1. Where is the circumcenter of a right triangle located?
a. inside the triangle
b. at a vertex of the triangle
c. on a side of the triangle
d. outside the triangle
2. What are the coordinates of this circumcenter of a triangle? (coordinates A(1, 1), B(1, -3), C(7, -3))
3. Where is the incenter of an obtuse triangle located?
a. outside the triangle
b. on the triangle
c. inside the triangle
d. cannot be determined
