geometry vocabulary

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Across
  1. 2. word that starts with R
  2. 4. two lines that are in opposite directions
  3. 5. 3D shape with identical parallel ends flat faces
  4. 7. not pointed or acute
  5. 8. plane figure with min three straight sides
  6. 9. two lines that are beside each other
  7. 15. a quadrilateral with 1 pair of parallel sides
  8. 16. line that is curved inwards
  9. 18. two-dimensional surface
  10. 19. 3D shape of a three side 2D shape
Down
  1. 1. two halves that mach up
  2. 3. 2D shape with 6 sides
  3. 6. two angels that sum is 180
  4. 10. angles measure less than 90 degrees
  5. 11. a curve joining two points
  6. 12. a straight line
  7. 13. two angles next to each other
  8. 14. line that goes across
  9. 17. the proper way of saying corner
  10. 18. a location represented by a dot