Cogitare Geometry

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Across
  1. 2. number of diagonals of a Decagon
  2. 5. A Polygon in which atleast one interior angle is a reflex angle
  3. 9. 90 degrees
  4. 10. Lines that never meet
  5. 11. a uniform solid with no flat surface
  6. 13. A polygon in which all sides are equal and all angles are equal
Down
  1. 1. The point of intersection of altitudes in a triangle
  2. 3. The number of points on a line
  3. 4. Points that are in the same plane
  4. 6. a uniform solid
  5. 7. An angle less than 90 degrees
  6. 8. Another name for a traingular pyramid or a triangle-based pyramid
  7. 11. a property of co-interior angles of two parallel lines cut by a transversal
  8. 12. A polygon with nine sides