Geometry Unit 1 Vocab

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Across
  1. 3. ALWAYS the first step when writing a two column proof
  2. 8. a point, line, or ray that divides a segment or angle into two congruent halves
  3. 11. congruent angles formed when two lines intersect
  4. 13. definition of _______ used when going from a congruent to equal sign in a proof (or vice versa)
  5. 14. the point on a line segment that bisects the segment into two congruent halves
  6. 18. an angle measuring exactly 180 degrees
  7. 21. a location on a coordinate plane with no dimension
  8. 24. two angles whose measures sum to 180 degrees
  9. 28. property stating that if two quantities are equal to the third quantity, then we can say that all the quantities are equal to each other
  10. 29. two angles in the same plane that share a common vertex and a common side but no common interior points
  11. 30. a straight path of points with no width or thickness extending forever in either direction
  12. 31. points and lines that lie in the same plane
  13. 34. use this many letters to name an angle or plane
  14. 35. a triangle that has three congruent sides and three congruent angles
  15. 36. property used when something is congruent to itself (often a shared side, length, or angle)
Down
  1. 1. theorem used to find the third side of a right triangle
  2. 2. part of a line consisting of two endpoints and all the points in between them
  3. 4. type of conditional statement formed by negating the original hypothesis and conclusion
  4. 5. the common endpoint of two rays that form an angle
  5. 6. angles that measure greater than 90 degrees
  6. 7. type of conditional statement formed by switching the hypothesis and conclusion
  7. 9. an angle measuring exactly 90 degrees
  8. 10. a pair of supplementary adjacent angles that sit together on a line and form a straight angle
  9. 12. property (of)______ that allows you to do math on both sides of an equation
  10. 15. use ONLY this many letters to name a line or segment
  11. 16. two angles whose measures sum to 90 degrees
  12. 17. a triangle that has two congruent sides and two congruent angles
  13. 19. type of statement that can be written in the form "if p, then q"
  14. 20. a part of a line that extends infinitely in one direction
  15. 22. phrase used between hypothesis and conclusion of a biconditional statement
  16. 23. points that do not lie on the same line together
  17. 24. a triangle that has no congruent sides
  18. 25. a flat surface that extends forever in two dimensions
  19. 26. angles that measure less than 90 degrees
  20. 27. type of statement formed when both the conditional and its converse are true
  21. 32. points that lie on one line together
  22. 33. postulate used when adding segments