Polygons

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Across
  1. 2. quadrilateral with two pair of equal sides
  2. 3. nine equal straight sides and nine angles
  3. 8. quadrilateral whose four sides have equal length
  4. 9. a three sided basic geometric shape
  5. 11. point where edges connect
  6. 15. two equal sides
  7. 16. three legged triangle with all sides different
  8. 17. two dimensional figure with four equal straight sides
  9. 18. a quadrilateral with only one pair of parallel lines
  10. 20. ninety degrees capital L
  11. 21. having four straight sides
Down
  1. 1. having four straight sides creating four right angle
  2. 4. figure with eight straight sides and eight equal angles
  3. 5. more than ninety degree angles
  4. 6. two lines that meet forming an L or ninety degree angle
  5. 7. two straight lines that never intersect
  6. 10. angle of side across from the same angle or side
  7. 12. a portion of a larger group
  8. 13. several points creating a polygon
  9. 14. collection of distinct elements
  10. 16. seven sided polygon
  11. 19. four sided plane rectilinear opposite sides parallel