Hello, whmandy!

In an acute triangle, the altitudes intersect inside the triangle.Classify each concurrency described as being inside, outside, or on the triangle.

1. the orthocenter of an acute triangle

. . The orthocenter isinsidethe triangle.

In any triangle, the angle bisectors intersect inside the triangle.2. the incenter of an obtuse triangle

. . The incenter is alwaysinsidethe triangle.

A right triangle can be inscribed in a semicircle.3. the circumcenter of a right triangle

Its circumcenter is the midpoint of the hypotenuse.

. . The circumcenter isonthe right triangle.