Geometry Crossword Puzzle

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