Geometry

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Across
  1. 5. Two shapes with the same size and shape
  2. 9. The size of a shapes surface
  3. 10. Each side of a shape added up
  4. 12. A line joining two vertices
  5. 13. A 90 degree angle is also called a?
  6. 14. A shape with 6 sides
  7. 15. An angle between 91 and 180 degrees
  8. 17. A long object with no width, depth, or curve is called what?
  9. 18. A shape with 4 equal sides
  10. 19. (_,_)
Down
  1. 1. Two straight lines that don't intersect
  2. 2. A shape with 5 sides
  3. 3. A shape with 2 pairs of parallel sides
  4. 4. A shape with 8 sides
  5. 5. A 360 degree shape
  6. 6. The middle point of a line
  7. 7. A shape with 3 sides
  8. 8. An angle between 1 and 89 degrees
  9. 11. Half of the diameter
  10. 16. A curve around two points