geometrical shapes

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Across
  1. 3. / I have no side
  2. 4. / all my legs have different lengh
  3. 7. / I've got three sides with two equal
  4. 8. / I've got four equal sides
  5. 9. / you can meet me in a circus
  6. 10. / I'm a triangle
Down
  1. 1. / I've got four right angles
  2. 2. / they are geometrical
  3. 5. / regular shape
  4. 6. / I've got many many properties