color and shapes

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Across
  1. 3. A shape with no sides and no corners
  2. 6. The color of the sky on a clear day
  3. 7. The color of grass
  4. 8. A shape with three sides
Down
  1. 1. The color you get by mixing red and blue
  2. 2. A shape with eight sides
  3. 4. A shape with four equal sides
  4. 5. A color often associated with sunshine