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The point of concurrency of a triangle's three medians.
1. Midsegment of a triangle
2. Incenter
3. Centroid
4. Orthocenter
If two angles of one triangle are congruent to two angles of another triangle, then the third pair of angles are congruent.
1. Triangle Sum Theorem
2. Third Angles Theorem
3. Pythagorean Theorem
4. Exterior Angle Theorem
The point of concurrency of the three angle bisectors of a triangle.
1. Median of a triangle
2. Centroid
3. Incenter
4. Orthocenter
A segment from a vertex to the midpoint of the opposite side of a triangle.
1. Median of a triangle
2. Orthocenter
3. Centroid
4. Circumcenter