geometry

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Across
  1. 5. - "Four-sided shape with right angles"
  2. 7. - "Tubular shape with two ends"
  3. 9. - "Sharp tip"
  4. 10. - " Straight path"
  5. 11. - "Four-sided shape with equal sides"
  6. 13. - "Measure of a turn"
  7. 14. - "Ball-shaped object"
  8. 16. - "Corner point"
  9. 18. - "Measurement of size"
  10. 19. - "Boundary line"
  11. 20. - "Flat surface"
Down
  1. 1. - "Four-sided shape"
  2. 2. - "Curved shape with no end"
  3. 3. - "Area or room"
  4. 4. - "Three-sided shape"
  5. 6. - "Form or outline"
  6. 8. - "Tapered shape with a base and height"
  7. 12. - "Front surface"
  8. 15. - "Triangular shape with a base and height"
  9. 17. - "Many-sided shape"