Note: Your teacher will grade your response to questions 13–15 to ensure you receive proper credit for your answer.

For a triangle, list the respective names of the points of concurrency of

perpendicular bisectors of the sides
bisectors of the angles
medians
lines containing the altitudes

The respective names of the points of concurrency are:

1. Perpendicular bisectors of the sides: Circumcenter
2. Bisectors of the angles: Incenter
3. Medians: Centroid
4. Lines containing the altitudes: Orthocenter