Geometry A Unit 1 Vocabulary

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