Geometry Crossword Puzzle

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Across
  1. 2. perpendicular to one side from opposite vertex
  2. 4. has a vertex
  3. 7. type of proof
  4. 10. bottom half of an isosceles triangle
  5. 13. opposite and negative of original
  6. 14. shape of a stop sign
  7. 15. all 3 angles vary
Down
  1. 1. creates a "Z" with angles
  2. 3. has 2 pairs of parallel lines
  3. 5. less than 90 degrees
  4. 6. a point in the middle of a segment
  5. 8. greater than 90 degrees
  6. 9. 2 congruent angles and 2 congruent sides
  7. 11. continues forever in 2 different directions
  8. 12. creates two equal parts