Crossword Puzzle

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Across
  1. 4. The center of the graph.
  2. 6. The most special triangle, with 3 same lines.
  3. 8. The intersection of three perpendicular bisectors
  4. 9. A triangle has three different lines.
  5. 12. The length of a figure.
  6. 16. Divide a line equally and vertically
  7. 17. The intersection of three bisectors.
Down
  1. 1. A triangle has two same lines.
  2. 2. The shortest distance in the graph.
  3. 3. A rectangle with two adjacent sides equal.
  4. 5. Two sets of parallel quadrilateral
  5. 7. The most common three-sided figure's name.
  6. 10. Divide a line into two equal parts.
  7. 11. The most common four-sided
  8. 13. A parallelogram with two adjacent sides equal
  9. 14. A parallelogram with two right angle.
  10. 15. Intersection of three perpendicular lines