Geometry Crossword Puzzle

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Across
  1. 5. if 2 parallel lines are cut by a transversal, then each pair of alternate exterior angles is congruent
  2. 7. if a=b,then a can be replaced by b in any equation
  3. 12. if 2 angles of 1 triangle are congruent to 2 angles of a 2nd triangle, then the 3rd pair of angles are congruent
  4. 14. the sum of the measures of the angles of a triangle is 180 degrees
  5. 17. if a=b,then a+c=b+c If a=b,then a-c=b-c
  6. 18. if a=a,then a=a
  7. 19. if 2 parallel lines are cut by a transversal,then each pair of corresponding angles is congruent
  8. 20. if 2 parallel lines are cut by a transversal, then each pair of consecutive interior angles is supplementary
Down
  1. 1. angle across from each other
  2. 2. a triangle with no right angles
  3. 3. if a=b,then b=a
  4. 4. if a=b,then ac=bc if a=b,then a/c=b/c (if c doesn't = 0)
  5. 6. the measure of an exterior angle of a triangle is equal to the sum of the measures of the 2 remote interior angles
  6. 8. in a plane if a line is perpendicular to one of 2 parallel lines, then it is perpendicular to the other
  7. 9. a line in the same plane as a circle that intersects the circle in exactly one point
  8. 10. 2 angles that create a straight line
  9. 11. if 2 parallel lines are cut by a transversal, then each pair of alternate interior angles is congruent
  10. 13. angles that share a common ray
  11. 15. if a=b and b=c,then a=c
  12. 16. if a is a real number a(b+c)=ab+ac