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Across 3. Consists of two points, called the endpoints of the segment and all points between them that are with the two points 6. the point of concurrency of the three medians of a triangle; triangle's center of gravity 9. the segment that connects the vertex of a triangle to the midpoint of its opposite side 10. a triangle with three congruent sides 11. divides an angle into two equal sides 12. same distance 13. formed by two rays that share a common endpoint, provided the two rays are noncollinear 14. a line, ray, or segment in a plane that passes through the midpoint of a segment in a plane 15. the point of concurrency for the three altitudes of a triangle 16. a circle which passes through all the vertices of a polygon

Down 1. a bisector that is also perpendicular to the segment 2. a 6-sided figure whose sides are the same length and whose angles have the same measure 4. the largest circle contained in a triangle, it touches the three sides 5. lines that lie in the same plane and do not intersect 7. the segment that connects the midpoints of two sides of a triangle 8. point of concurrency for the three perpendicular bisectors of a triangle 13. a perpendicular segment from a vertex to the opposite side or to a line containing the opposite side