Geometry

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Across
  1. 2. rectangle circle
  2. 7. scalene
  3. 8. Circumference
  4. 11. prism
  5. 14. acute chord
  6. 15. diameter rhombus
  7. 16. square
  8. 17. polygon
  9. 20. Collinearity
  10. 21. Oblique
Down
  1. 1. IntersectingLineSegments
  2. 3. Degenerate
  3. 4. angle
  4. 5. Lines
  5. 6. decagon
  6. 9. polyhedron
  7. 10. square Quadrilateral
  8. 12. Perpendicular
  9. 13. supplementary
  10. 18. Vertex ScaleneTriangle
  11. 19. kite