Angle Relationship Vocabulary

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Across
  1. 8. a closed figure with eight sides
  2. 12. two lines that intersect at a right angle
  3. 15. _____ angles add to 90 degrees
  4. 16. ______ triangles have three congruent angles
  5. 18. a closed figure with seven sides
  6. 19. a closed figure with nine sides
  7. 20. ______ angles share a vertex and a side
  8. 21. ______ triangles have no congruent sides or angles
  9. 22. a closed figure with three sides
Down
  1. 1. a closed figure with four sides
  2. 2. _____ angles that form a line
  3. 3. an angle with 90 degrees
  4. 4. ______ angles are opposite each other and are created by intersecting lines
  5. 5. two lines that never intersect
  6. 6. a figure with three or more sides
  7. 7. _______ triangles have two congruent sides
  8. 8. an angle greater than 90 and less than 180
  9. 9. _____ angles add to 180 degrees
  10. 10. a closed figure with six sides
  11. 11. a closed figure with ten sides
  12. 13. equal
  13. 14. a closed figure with five sides
  14. 17. an angle less than 90 degrees