Shapes

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Across
  1. 3. I am the shape of poker card.
  2. 6. I am a girl's best friend.
  3. 7. I look like a smile.
  4. 8. I look a bit like an egg.
  5. 9. I have four corners.
Down
  1. 1. I have no sides.
  2. 2. I have five sides.
  3. 4. I have sharp angles.
  4. 5. You need me to live.
  5. 9. I shine in the night sky.