Geometry puzzle

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Across
  1. 2. A device for drawing Circles
  2. 5. Size of a part when compared with the whole
  3. 8. Straight line joins two points on a curve
  4. 10. Smooth surface
Down
  1. 1. Longest chord of circle
  2. 3. A Dot
  3. 4. A perfect round figure
  4. 6. Curve is known as
  5. 7. Straight line from the center of circle
  6. 9. Figure with three sides