Geometry

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Across
  1. 1. Curved from every side also 3D
  2. 3. I have only 1 end point
  3. 6. 2D flat surface
  4. 7. a type of angle that is correctly 90 degree write only the name
  5. 8. I have two identical rectilinear faces and all my other faces are quadrilateral
  6. 11. always on the boundaries of a circle
  7. 12. a closed plane figure
Down
  1. 2. a type of line that maintains the same distance
  2. 4. a polygon is a figure four edges and four vertices
  3. 5. a common end point formed by two rays
  4. 6. I have one base and other faces are triangular in shape also I meet on a endpoint named apex
  5. 9. always round
  6. 10. I have 4 faces,6 edges and 4 vertices