geometry vocab

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Across
  1. 2. a polygon with four equal sides and four right angles
  2. 5. a parallelogram with four equal sides
  3. 10. a straight line from the center to the perimeter of a circle
  4. 11. a three-sided polygon
  5. 13. a shape with a circular base and sides tapering to a point
  6. 14. a round three-dimensional closed surface
  7. 17. a parallelogram with four right angles
  8. 20. the perimeter of a circle
Down
  1. 1. intersects at a 90-degree angle
  2. 3. identical in shape and size.
  3. 4. a four-sided polygon
  4. 6. a line that touches a curve at only one point
  5. 7. the measure of the two-dimensional space
  6. 8. a portion of a circle
  7. 9. a part of a line that starts at a fixed point
  8. 12. a point where two or more curves, lines, or line segments meet
  9. 15. a location represented by a dot
  10. 16. the quality of being alike
  11. 18. a straight line segment that connects two points
  12. 19. the space between two lines or planes that intersect