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Across 4. point where two sides intersect on angle or polygon 6. line segment with one endpoint in the center of a circle and the other endpoint on the circle 9. pair of opposite congruent angles formed by intersecting lines 11. angle that measures less than 90 degrees 14. exact location in space 15. part of a line that starts in one point and continues forever 16. angles on the inner sides of two lines intersected by a third line 17. nine-sided polygon 18. seven-sided polygon 20. set of points in a plane that are the same distance from the center 22. quadrilateral with exactly one pair of parallel sides 25. angles formed by two lines entersected by a third line 31. having same shape and same size 35. object or structure looks the same after a specific change occurs 36. triangle with no congruent sides 37. four-sided polygon 38. matching two or more angles or polygons 39. three-sided polygon 40. lines that lie in different planes that are neither parallel or perpendicular

Down 1. six-sided polygon 2. ratio of circumference to the length of its diameter; 3.14 3. eight-sided polygon 5. angle that measures 90 degrees 7. ten-sided polygon 8. five-sided polygon 10. line segment that joins two points on the circumference of a circle 12. number of square units needed cover a given surface 13. line segment that passes through the center of a circle and has endpoint on the circle 16. triangle with two congruent sides 19. angles on the outer sides of two lines intersected by a third line 21. straight path that extends without end in opposite directions 23. lines that intersect to form right angles 24. parallelogram with all sides congruent 26. triangle with three congruent sides 27. distance around a polygon 28. lines that cross at exactly one point 29. distance around a circle 30. having same shape but not necessarily the same size 32. line that cuts across two or more parallel lines at different points 33. angle whose measures greater that 90 but less than 180 degrees 34. lines in a plane that do not intersect