2D and 3D shapes

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Across
  1. 3. A shape that is curved outwards.
  2. 6. Looks like a pipe.
  3. 7. A flat shape with 4 straight sides where opposite sides are parallel.
  4. 9. A 3 dimensional square.
  5. 12. Has 5 sides and points.
Down
  1. 1. Is the shape of a ball.
  2. 2. Half of a circle.
  3. 4. Has volume.
  4. 5. Has 6 sides.
  5. 8. Has 8 sides.
  6. 10. Is a shape with 3 sides with different lengths.
  7. 11. Same shape but can be flipped slid or turned.