Crossword Puzzle

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