Chapters 1, 2, 3, & 4 vocab

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Across
  1. 3. The branch of geometry which deals with a system of points, great circles, and spheres
  2. 6. A triangle with two congruent sides
  3. 7. A triangle all of whose angles are acute angles
  4. 8. A triangle with an obtuse angle
  5. 9. States there is exactly one line parallel to a line through a given point not on the line
  6. 10. Two nonadjacent angles formed by two intersecting lines
  7. 11. The distance between two lines measured along a perpendicular line to the line is always the same
  8. 12. The angles of a triangle that are not adjacent to a given exterior angle
  9. 15. Points that lie in the same plane
  10. 17. A line that intersects two or more lines in a plane at different points
  11. 18. A line or line segment added to a given figure to help in proving a result
  12. 20. The statement formed by negating both the hypothesis and conclusion of a conditional statement
  13. 21. For all numbers a, b, and c, if a=b and b=c, then a=c
  14. 22. A triangle with all angles congruent
  15. 24. Lines in the same plane that do not intersect
Down
  1. 1. The statement formed by interchanging the hypothesis and conclusion of a conditional statement
  2. 2. A statement of the form "If A, then B" The part following "if" is called the hypothesis. The part following "then" is called the conclusion
  3. 4. In general, B is between A and C if and only if A, B, and C are collinear and AB+BC=AC
  4. 5. For every number a, a=a
  5. 11. A triangle with all three congruent sides
  6. 13. A point M is the midpoint of segment PQ if M is between P and Q and PM=MQ
  7. 14. Lines Lines that do not intersect and are not in the same plane
  8. 15. Triangles that have their corresponding parts congruent
  9. 16. Two angles that have a common vertex and a common side, but no common interior angles
  10. 19. A pair of adjacent angles whose noncommon sides are opposite rays that form a line
  11. 23. The denial of a statement