Crossword Time !

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Across
  1. 1. Plural for half a diameter
  2. 4. All points in a circle are at the same distance from this point
  3. 6. The distance across a circle through its centre
  4. 7. A shape with all points at the same distance from its centre
  5. 9. The shape of a circle
  6. 10. A tool for drawing geometrical circles
Down
  1. 2. A circle has 360 of these units
  2. 3. A circle has __________ points
  3. 4. The distance around a circle
  4. 5. The distance from the centre of a circle to any point on the circle
  5. 8. A line joining two points on the circle
  6. 11. A part of the circle