Shapes

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Across
  1. 3. 3D triangle with a round base
  2. 4. sliver of a moon
  3. 6. diamond
  4. 7. no angles or lines
Down
  1. 1. 3D tube parallel lines and circle ends
  2. 2. five sides
  3. 5. four equal sides
  4. 7. 3D square