geometry

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Across
  1. 1. acute angle
  2. 4. linearpair
  3. 7. polygon
  4. 8. rightangle
  5. 10. adjacent angle
  6. 11. supplementary angle
Down
  1. 2. complementaryangle
  2. 3. vertical angle
  3. 5. obtuseangle
  4. 6. congruent
  5. 9. parallel lines