Math crossword puzzle

1234567891011121314151617181920
Across
  1. 3. is a relation between 2 variables
  2. 7. is the study of the parts of triangles
  3. 9. is a polygon with four sides
  4. 11. a quadrilateral with 1 pair of parallel sides
  5. 13. what do you call the quality of the two ratios
  6. 15. is the side formed by the vertices of 2 angles between
  7. 16. is an equation that contains one unknown(x) and the highest degree of x is 2
  8. 17. name given to the graph of a quadratic function
  9. 18. is a type of variation where in the variable increase or decrease together
  10. 19. is a type of variation where one variable increases the other variable decreases or vice versa
  11. 20. is a trapezoid with congruent legs
Down
  1. 1. 2 triangles which corresponding angles are congruent but the corresponding sides are proportional
  2. 2. it indicates that a variable varies directly with 2 or more variable
  3. 4. is the angle between the imaginary line of sight and a horizontal line where the object is above the observe
  4. 5. is a relation where one variable varies directly with 2 or more variable
  5. 6. is a polynomial function of second degree
  6. 8. the comparison of 2 quantities of the same kind of unit written as a/b or a:b
  7. 10. it is an angle forms by two sides between
  8. 12. set of the real numbers
  9. 14. is polygon that has four sides