Shapes and angles

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Across
  1. 3. has 3 faces and 2 edges
  2. 6. greater than 90 degrees but less than 180
  3. 7. only has 1 face
  4. 9. has only 3 faces
  5. 12. 4 sided shape with all right angles
  6. 13. only has 6 faces
Down
  1. 1. exact 180 degrees
  2. 2. 4 sided with all right angles to
  3. 4. greater than 180 degrees
  4. 5. has only 4 faces 6 edges and 4 vertices
  5. 8. exact 90 degrees
  6. 10. less than 90 degrees
  7. 11. has only 1 face and one vertice