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Across 4. When two segments have the same length. 5. A segment connecting the midpoint of one side of a triangle to the midpoint of another side of a triangle. 7. The "height" of a triangle. 9. The point of concurrency of the perpendicular bisectors of a triangle. 12. A segment that divides an angle into two equal halves. 13. The incenter equidistant from these.

Down 1. The point of concurrency of the angle bisectors of a triangle. 2. A perpendicular segment at the midpoint of a triangle's side. 3. When two points are the same distance from something. 6. The point of concurrency of the medians of a triangle. 8. The point of concurrency of the altitudes of a triangle. 10. The circumcenter is equidistant from these. 11. A segment from the midpoint of a triangle's side to the opposite vertex.