Geometry Crossword By: Maci Stackhouse

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Across
  1. 5. Points all in one plane.
  2. 6. A figure formed by two rays that have the same endpoint. The two rays are called the side of the angle. Their common endpoint is the vertex.
  3. 10. Lines that are not coplanar.
  4. 13. A triangle with all sides congruent.
  5. 14. A kind of reasoning in which the conclusion is based on several past observations.
  6. 18. The perpendicular segment from a vertex to the line containing the opposite side.
  7. 19. A line that contains a chord.
Down
  1. 1. An example used to prove that an if-then statement if false.
  2. 2. An angle with measure 180.
  3. 3. A 10-sided polygon.
  4. 4. A chord that contains the center of a circle.
  5. 7. Circles that lie in the same plane and have the same center.
  6. 8. A statement that can be proved easily by applying the theorem.
  7. 9. A statement which is accepted without prove.
  8. 11. A triangle with all angles congruent.
  9. 12. A statement that contains the words “if and only if.”
  10. 15. Proving statements by reasoning from accepted postulates, definitions, theorems, and given information.
  11. 16. The set of all points.
  12. 17. A segment joining two non-consecutive vertice of a polygon.
  13. 20. A segment whose endpoints lie on a circle.