Geometry

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Across
  1. 3. an angle greater than 90 degrees but less than 180 degrees
  2. 4. a polygon with four sides
  3. 8. a rectangle having all four sides of equal length
  4. 11. a straight line extending from the center of a circle or sphere to the circumference or surface
  5. 12. a 90 degree angle
  6. 15. a continuous extent of length
  7. 16. a triangle having three unequal sides and angles
  8. 20. a triangle with all sides equal and all angles equal
  9. 21. a polygon having eight angles and eight sides
  10. 22. the part of a straight line considered as originating at a point on the line and as extending in one direction from that point
  11. 23. a quadrilateral plane figure having two parallel and two nonparallel sides
  12. 25. the intersection point of two sides of a plane figure
  13. 27. line segments that cross each other
  14. 28. line segments that do not intersect
  15. 29. a position in space
Down
  1. 1. a parallelogram having four right angles
  2. 2. a curve that is continuous and has endpoints that meet at the same point
  3. 5. a triangle with one internal angle equal to 90 degrees
  4. 6. Segments two line segments which cross to form 90 degree angles
  5. 7. a triangle which has two sides equal
  6. 9. an angle less than 90 degrees but greater than 0 degrees
  7. 10. a closed plane curve consisting of all points at a given distance from a point within it called the center
  8. 13. one part of a line
  9. 14. a polygon with 5 sides and 5 angles
  10. 17. a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end
  11. 18. the line segment between two points on a given curve
  12. 19. an equilateral parallelogram having oblique angles
  13. 24. a quadrilateral having both pairs of opposite sides parallel to each other
  14. 26. a polygon having six sides and six anglesDiameter