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Across
  1. 6. a parallelogram with all sides congruent
  2. 9. all angles are equal
  3. 10. a angle that measures less than 90 and more than 0
  4. 13. part of a a line that has one endpoint and is infinite in the other direction
  5. 14. a 3-dimensional figure that has two congruent parallel polygonal faces
  6. 15. a quadrilateral with 2 pairs of adjacent congruent sides
  7. 16. a segment through a vertex of a triangle and is perpendicular to the side opposite the vertex
  8. 17. a 3-dimensional figure that has a circular base and narrows to a point
  9. 18. part of a line with two endpoints
  10. 19. an angle that measures more than 90 and less than 180
  11. 21. an angle whose vertex is on a circle and sides are chords of a circle
  12. 23. the congruent sides of an isosceles triangle or the perpendicular sids of a right triangle
  13. 26. two lines that intersect to form a right angle
  14. 28. non-adjacent outside angles on opposite sides of a transversal
  15. 33. two non-adjacent angles formed by two intersecting lines
  16. 35. a triangle with at least two sides congruent
  17. 37. two angles that share a vertex and side
  18. 38. a line that intersects a circle at exactly one point
  19. 39. a 3-dimensional figure that has two congruent parallel circular bases
Down
  1. 1. non-adjacent interior and exterior angles on the same side of a transversal
  2. 2. a 4-sided figure
  3. 3. a 3-dimensional figure that has a polygonal base and faces that narrow to a point
  4. 4. the longest side of a right triangle
  5. 5. a shape with 6 sides
  6. 7. a figure with 10 sides
  7. 8. a segment that separates an angle into two equal parts
  8. 11. a point that separates a segment into two equal parts
  9. 12. a segment that goes through the center and whose endpoints are on a circle
  10. 20. an infinite set of points in a straight path
  11. 22. a segment whose endpoints are two non-adjacent vertices of a polygon
  12. 24. a 3-dimensional figure where every point on its surface is equidistant from its center point
  13. 25. all sides equal
  14. 26. a quadrilateral with 2 sets of parallel sides
  15. 27. coplanar lines that do not intersect
  16. 29. a segment whose endpoints are the center of a circle and a point on a circle
  17. 30. an arc that measures 180
  18. 31. a quadrilateral with one set of parallel sides
  19. 32. two angles whose sum is 180
  20. 34. equal measure
  21. 36. a 8-sided shape