geometry

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Across
  1. 2. negating the hypothesis, negating the conclusion, and switching them
  2. 4. any two angles whose sum is 90
  3. 8. two angles that are next to each other and share a common side
  4. 9. two angles across from each other on intersecting lines and always congruent
  5. 13. if a=b, then a+c=b+c
  6. 16. if a=b, then a/c=b/c
  7. 17. how much a figure will enlarge and reduce
  8. 19. if a=b, a-c=b-c
  9. 20. if a(b+c), then a(b+c)=ab+ac
Down
  1. 1. if a=b, then b=a
  2. 3. replacing the hypothesis with its negation and replacing the conclusion with its negation
  3. 5. if a=b, then ac=bc
  4. 6. a figure has point symmetry if the figure can be mapped onto itself by rotating the figure 180 about a center point
  5. 7. any two angles whose sum is 180
  6. 10. two angles that are adjacent and supplementary and they form a straight line
  7. 11. if the figure can be mapped onto itself by a reflection line
  8. 12. a figure has rotational symmetry if the figure can be mapped onto itself by rotating the figure less than 360 about a center point
  9. 14. exchanging the hypothesis and conclusion
  10. 15. an enlargement or reduction
  11. 18. using the given hypothesis and conclusion