Circles

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Across
  1. 3. from the centre point to the edge of the circle
  2. 4. used to keep track of time
  3. 6. used to watch movies at home
  4. 9. pi
  5. 10. used to see
Down
  1. 1. is a 3D circle which can be bounced
  2. 2. approximately 3 times of the diameter
  3. 5. crosses through the centre point
  4. 7. apple pie very red
  5. 8. circumference divided by diameter