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Parallel Lines

Parallel Lines. Lines in the same plane that do not intersect. Midpoint. The point that separates a segment into two segments of equal length. Obtuse Angle. An angle with degree measure greater than 90 and less than 180. Collinear. Points that lie on the same line. Line.

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Parallel Lines

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  1. Parallel Lines

  2. Lines in the same plane that do not intersect

  3. Midpoint

  4. The point that separates a segment into two segments of equal length

  5. Obtuse Angle

  6. An angle with degree measure greater than 90 and less than 180

  7. Collinear

  8. Points that lie on the same line

  9. Line

  10. Extends indefinitely in both directions and has no thickness or width

  11. Vertical Angles

  12. Two non-adjacent angles formed by two intersecting lines

  13. Skew Lines

  14. Lines that do not intersect and are not on the same plane

  15. Isosceles Triangle

  16. A triangle that has at least 2 sides equal in length

  17. Hypotenuse

  18. In a right triangle, the side opposite the right angle

  19. Centroid

  20. The common point of the medians of a triangle

  21. Median

  22. A segment that joins a vertex of the triangle with the midpoint of the opposite side

  23. Slope

  24. The ratio of a line’s vertical rise to its horizontal run

  25. Midsegment

  26. The segment joining the midpoints of two sides of a triangle

  27. Orthocenter

  28. The common point of the lines containing the altitudes of a triangle

  29. Vertex

  30. The common endpoint of the rays that form an angle

  31. Scalene Triangle

  32. A triangle with no sides of equal length

  33. Transversal

  34. A line that intersects two or more coplanar lines at different points

  35. Oblique Lines

  36. Lines that do not form a 90 degree angle when they intersect

  37. Angle Bisector

  38. A ray that divides an angle into two congruent angles

  39. Ray

  40. Has exactly one endpoint and extends indefinitely in one direction

  41. Hypothesis

  42. In a conditional statement, the statement that immediately follows the word “if”

  43. Acute Angle

  44. An angle whose degree measure is less than 90 and more than 0

  45. Perpendicular Lines

  46. Two lines that intersect to form a right angle

  47. Congruent Segments

  48. Segments that have the same length

  49. Incenter

  50. The common point of the angle bisectors of a triangle

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