Geometry Crossword Puzzle

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Across
  1. 2. Something used to prove a statement
  2. 4. a pair of congruent angles that are formed by two lines intersecting
  3. 7. If then
  4. 8. an angle that measures less than 90 degrees
  5. 9. An accepted fact or statement
  6. 10. a line or ray that divides an angle into two congruent angles
  7. 12. an angle that measures more than 90 degrees
  8. 15. lying in the same straight line
  9. 16. the exact middle point of a line segment
  10. 18. Angles that lay on the same side of the transversal, both on the interior
  11. 19. m∠AOB+m∠BOC=m∠AOC,  the measure of the larger angle is the sum of the measures of the two smaller ones
Down
  1. 1. sum of said angles is equal to 90 degrees
  2. 3. a pair of angles that form a straight angle
  3. 4. an angular point of a polygon or other figure
  4. 5. an angle that measures exactly 90 degrees
  5. 6. sum of said angles is equal to 180 degrees
  6. 11. process of reasoning from one or more statements to reach a logical conclusion
  7. 13. a common side and vertex
  8. 14. if two angles form a straight angle, the sum of their measures is equal to 180 degrees
  9. 17. said angles have a common side and a common vertex