Shapes crosswords

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Across
  1. 3. Other word for it is corners
  2. 5. Lines never meet
  3. 7. Opposite of straight
  4. 8. A flat area in the shape
Down
  1. 1. No curved lines
  2. 2. Each half is the same
  3. 4. The same
  4. 6. There are lots of ____ in a shape