MATH CROSSWORD PUZZLE

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Across
  1. 2. the length across a circle
  2. 7. a constant factor in a variable term
  3. 8. a circle's circumference to diameter
  4. 10. a statement showing expression are =
  5. 11. terms that have the same variable
  6. 13. appearing to be solid
  7. 14. a group of integers that has no =
  8. 17. a symbol comparing expression as un=/=
  9. 18. part of a equation that can be added
Down
  1. 1. pair of opposite angles' lines divide
  2. 3. an angle that is that is more than 90°
  3. 4. an angle that is less than 90°
  4. 5. an angle that is 90°
  5. 6. the same distance from zero but across
  6. 9. the amount of space in an 3D object
  7. 12. the initial point of a unending line
  8. 15. a round plane figure
  9. 16. length of line from the inner circle