geometry

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Across
  1. 5. a plane figure with five straight sides and five angles
  2. 6. having all its sides of the same length
  3. 7. the quality of being made up of exactly similar parts facing each other or around an axis
  4. 8. a straight or curved extent of length
  5. 11. Angle that measure less than 90°
  6. 12. triangular pyramid
Down
  1. 1. extending or moving uniformly in one direction only, without a curve or bend
  2. 2. a plane figure with six straight equal sides
  3. 3. 6 equal sided prism
  4. 4. A flat 4 equal sided shape
  5. 5. at an angle of 90° to a given line, plane, or surface or to the ground
  6. 9. an angle more than 90° and less than 180°
  7. 10. a quadrilateral with no sides parallel