Quadratic A equation

123456789101112131415
Across
  1. 4. numbers with negative sing
  2. 5. a equation
  3. 7. zero on number line
  4. 10. name of your geometry's teacher
  5. 12. planet where we live
  6. 13. numbers start with zero
  7. 14. figure which has only tree sides
Down
  1. 1. numbers start with one
  2. 2. the result of multiplication
  3. 3. whole part with fraction
  4. 6. numerator greater than denominator
  5. 8. the results of subtraction
  6. 9. numerator less than denominator
  7. 10. the results of addition
  8. 11. a part of whole thing
  9. 15. mathematics part which learn about figures