geometry crossword

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Across
  1. 2. a segment across a circle through the center; twice the radius
  2. 4. Segment, part of a line with two end points
  3. 6. Lines, Lines that intersect to form right angles
  4. 10. the amount of space inside a shape
  5. 11. the total distance around a figure
  6. 12. a set of points all the same distance from a center point
  7. 15. part of a line with one endpoint that goes on forever In one direction
  8. 17. a closed figure made of straight line segments
  9. 18. two rays that meet at a common end point
Down
  1. 1. a polygon with 4 sides
  2. 3. the point where two lines or rays meet
  3. 5. a segment from the center of a circle to its edge
  4. 7. the distance around a circle
  5. 8. Lines, Lines that never intersect and stay the same distance apart
  6. 9. the amount of space inside a 3D object
  7. 13. a straight path that goes on forever In both directions
  8. 14. a polygon with three sides
  9. 16. an exact location with no size