Analytic Geometry

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Across
  1. 4. The point where the three altitudes of a triangle intersect.
  2. 6. One set of parallel sides and two sides the same length
  3. 11. All interior angles are 90 degrees
  4. 12. All interior angles are 90 degrees and all sides are the same length
  5. 14. A line which cuts an angle into two equal halves
  6. 15. Two sets of parallel sides with all sides being the same length
Down
  1. 1. Two sets of sides are the same length (nothing is parallel)
  2. 2. the point where all right bisectors of a triangle meet
  3. 3. Two sets of parallel sides
  4. 5. One set of parallel sides
  5. 7. a line which cuts a line segment into two equal parts at 90 degrees
  6. 8. The point where the three angle bisectors of a triangle meet.
  7. 9. The height from the base to the vertex of a triangle.
  8. 10. A line segment joining a vertex to the midpoint of the opposite side.
  9. 13. Point where all the medians of a triangle meet.