For a triangle, list the respective names of the points of concurrency of
perpendicular bisectors of the sides
a. bisectors of the angles
b. medians
c. lines containing the altitudes

Circumcenter.Incenter.Centroid.Orthocenter.

Step-by-step explanation:

The complete question is

For a triangle, list the respective names of the points of concurrency of (a) perpendicular bisectors of the sides (b) bisectors of the angles (c) medians (d) lines containing the altitudes.

The interception of all three perpendicular bisectors of a triangle is called the circumcenter.The interception of all three bisector of the angles in a triangle is called the incenter.The interception of all three medians of a triangle is called the centroid.The interception of all three lines containing altitudes is called the orthocenter.

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The answer is 76° i believe