Geometry Semester 1 Vocabulary Terms

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Across
  1. 3. points or lines that fall on the same plane are called this
  2. 6. pair of angles that add up to 180 degrees
  3. 8. 100 + ____ = the sum of all angles in a triangle
  4. 9. two congruent angles that are opposite each other
  5. 12. the slopes of these two lines are opposite reciporacals
  6. 15. to say the opposte if the conditional statement
  7. 17. formed by 3 angle bisectors crossing in a triangle
  8. 18. point of concurrency that is formed when 3 medians cross in a triangle
  9. 20. the two congruent angles in an isosceles triangle
  10. 22. this triangle has 3 congruent angles
  11. 25. this type of triangle has two or more congruent sides
  12. 27. switches the hypothesis and the conclusion
  13. 29. the total amount inside a figure
  14. 31. extends forever in both directions
  15. 32. lines that are not coplanar, not parallel, and do not intersect
  16. 35. type of angle that is greater than 90 degrees
  17. 36. Law of ___: If a conditional statement is true and its hypothesis is true, then its conclusion is true
  18. 40. hypotenuse and one of the legs are congruent
  19. 42. has no congruent sides
  20. 45. a conditional statement that contains the phrase "if and only if"
  21. 46. an if-then statement containing a hypothesis and conclusion
  22. 47. type of angle that is equal to 90 degrees
  23. 48. a point, ray, line, or segment that cuts a segment or angle in half
  24. 50. a line, segment, or ray that is perpendicular to the segment at its midpoint, thereby bisecting the segment into two congruent segments
  25. 52. to negate the hypothesis and conclusion
  26. 53. all three sides are congruent
  27. 56. has one obtuse angle and two acute angles
  28. 57. a line with two endpoints
  29. 59. pair of angles that add up to 90 degrees
Down
  1. 1. this follows the "then" part of a condtional statement
  2. 2. type of angle that is less than 90 degrees
  3. 4. has one right angle and two acute angles
  4. 5. sum of all the sides of the figure
  5. 7. The point of concurrency of the altitudes of a triangle
  6. 10. a segment whose endpoints are a vertex and the midpoint of the opposite side
  7. 11. this follows the "if" part of a condtional statement
  8. 13. in two congruent figures, their matching sides and angles are called?
  9. 14. the two congruent sies in an isosceles triangle
  10. 16. The point where the three perpendicular bisectors of a triangle are concurrent
  11. 19. Reasoning that is based on patterns you observe
  12. 21. two sides and the included angle are congruent
  13. 23. if two angles and a non-included side are congruent
  14. 24. point that divides the segment into two congruent segments
  15. 26. these lines have the same slope
  16. 28. Law of ___: Allows you to state a conclusion from two true conditional statements when the conclusion of one statement is the hypothesis of the other statement
  17. 30. the perpendicular segment from a vertex to the line containing the opposite side
  18. 33. a segment in a triangle that connects the midpoints of two sides
  19. 34. Once a triangle is proved congruent, you can use the congruence statement to know that certain sides or angles are congruent to their corresponding sides or angles
  20. 37. the process of reasoning logically from given statements to a conclusion
  21. 38. type of angle that is equal to 180 degrees
  22. 39. points that lie on the same line
  23. 41. pair a pair of adjacent angles that form a line
  24. 43. if two angles and an included side are congruent
  25. 44. this shape has exactly 3 acute angles
  26. 49. statement formed by both exchanging and negating the hypothesis and conclusion
  27. 51. polygon is this if a diagonal can go outside the shape
  28. 54. a polygon is this if
  29. 55. this triangle has 3 congruent sides
  30. 58. one endpoint and continues forever in one direction