Geometry

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Across
  1. 1. : A quadrilateral with at least one pair of parallel sides
  2. 5. : The measurement of how long something is
  3. 6. : The distance from the center of a circle to its edge
  4. 9. : A triangle with two equal sides
  5. 10. : The point exactly halfway along a line segment
  6. 12. : A perfectly round shape
  7. 13. : A quadrilateral with four equal sides and four right angles
  8. 15. : A quadrilateral with all sides equal in length
  9. 18. : A line segment joining two points on a circle
Down
  1. 2. : A triangle with all three sides equal
  2. 3. : The point at the end of a line segment
  3. 4. : The point where two lines or edges meet
  4. 7. : A line that passes through the center of a circle and connects two points on it
  5. 8. : A quadrilateral with two pairs of equal adjacent sides
  6. 11. : A quadrilateral with both pairs of opposite sides parallel
  7. 14. : An angle that is less than 90 degrees
  8. 16. : The vertical distance from base to top
  9. 17. : A triangle that has one 90-degree angle