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Across 4. A LINE ,RAY, OR SEGMENT THAT IS PERPENDICULAR TO A SIDE OF A TRIANGLE AT THE MIDPOINT OF THE SIDE 5. A RAY THAT DIVIDES AN ANGLE INTO TWO ADJACENT ANGLES THAT ARE CONRUENT 7. PERPENDICULAR SEGMENT FORM A VERTEX OF A TRIANGLE TO THE OPPOSITE OR TO THE LINE THAT CONTAINS THE OPPOSITE SIDE. 9. THREE OR MORE LINE THAT INTERSECT IN THE SAME POINT 11. A SEGMENT WHOSE END POINTS ARE A VERTEX OF THE TRIANGLE AND THE MIDPOINT OF OPPOSITE SIDE 12. POINT OF CONCURRENCY OF THE MEDIANS OF A TRIANGLE 14. THE POINT THAT DIVIDES OR BISECTS A SEGMENT INTO TWO CONGRUENT SEGMENT 15. TWO LINES THAT INTERSECT

Down 1. A BISECTOR OF AN ANGLE OF THE TRIANGLE 2. A SEGMENT THAT CONNECTS THE MIDPOINT OF TWO SIDES OF A TRIANGLE 3. THE POINT OF INTERSECTION OF CONCURRENT LINES 6. HAS ONE OR MORE POINTS IN COMMON 8. POINT OF CONCURRENCY OF LINES CONTAINING THE ALTITUDES OF A TRIANGLE 10. THE DISTANCE AROUND A CIRCLE 13. THE POINT OF CONCURRENCY OF THE ANGLE BISECTORS OF A TRIANGLE