Geometry A Unit 1 Vocabulary

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Across
  1. 2. lines that lie in the same plane and do not intersect
  2. 8. that intersect to form right, or 90-degree, angles
  3. 11. in a statement
  4. 13. a statement thought to be true but not yet proved true or false
  5. 15. two angles whose measures have a sum of 90 degrees
  6. 16. rays that are collinear and have the same endpoint but run infinitely in opposite directions
  7. 17. tool used to measure an angle in degrees
  8. 18. the property states that for all real numbers 𝑥, 𝑦, and 𝑧, if 𝑥 = 𝑦 and 𝑦 = 𝑧, then 𝑥 = 𝑧; or if two figures (or sides, angles, etc.) are each
  9. 20. the process of utilizing facts, properties, definitions, and theorems to form a logical argument
  10. 21. a statement that has been proven based on previous theorems, postulates, or axioms
  11. 23. a part of a line that has two endpoints and a specific length
  12. 24. two angles whose measures have a sum of 180 degrees
  13. 25. part of a line that has one endpoint and extends indefinitely in one direction
  14. 28. the property that states that for any real number 𝑥, 𝑥 = 𝑥; or that a figure and its parts (e.g., sides, angles, triangles, etc.) are congruent to themselves
  15. 29. a point on a line segment that is equidistant from the two endpoints
  16. 30. two angles that have the same measure
Down
  1. 1. angles opposite angles formed by two intersecting lines
  2. 3. two adjacent angles whose noncommon sides are opposite rays
  3. 4. to a third figure, then the two figures are congruent
  4. 5. the set of all points in a plane that are a given distance away from a given point called the center
  5. 6. contained within the same plane
  6. 7. two line segments that have the same length
  7. 9. two adjacent angles whose noncommon sides are opposite rays
  8. 10. the property stating that if two values are equal, then they are interchangeable in an equation; or if two figures are congruent, then they are
  9. 12. two coplanar angles with a common side, a common vertex, and no common interior points
  10. 14. a statement accepted without proof; also known as an axiom
  11. 19. to divide into two congruent parts
  12. 22. the property that states that the left and right sides of an equation or congruence statement are interchangeable
  13. 26. a figure formed by two rays that share a common endpoint
  14. 27. points that lie on the same line