complete the crossword puzzle below.

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Across
  1. 2. of symmetry A graph that passes through its minimum/maximum point
  2. 4. the space (usually measured in degrees) between two intersecting lines or surfaces at or close to the point where they meet.
  3. 6. it means four
  4. 11. exponent all numbers,letters,expression raise to 0 power is equal to 1
  5. 15. A relationship of variation between two variables in which the product is a constant
  6. 16. it involves nth root
  7. 17. a quantity representing the power to which a given number or expression is to be raised, usually expressed as a raised symbol beside the number or expression (e.g., 3 in 23 = 2 × 2 × 2)
  8. 18. the branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of
  9. 19. plural of index
  10. 21. The angle below horizontal that an observer must look to see an object that is lower than the observer
  11. 24. Quadratic graphs that are part of curved family
  12. 26. the length of the opposite side divided by the length of the adjacent side
  13. 27. an angle between 90 degree-180 degree
  14. 28. in the word quadrilateral, lateral means?
  15. 30. An expression that involves radical sign (√͞ or √)
Down
  1. 1. mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other
  2. 3. we can obtain this ratio by multiplying or dividing both parts by the same constant.
  3. 5. the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse
  4. 7. Equations that have one or more algebraic fractions
  5. 8. the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.
  6. 9. longest side of a right-angled triangle
  7. 10. The expression b²-4ac
  8. 12. the quantitative relation between two amounts showing the number of times one value contains or is contained within the other
  9. 13. Expression that consists of algebraic terms, operation symbols or bracket signs
  10. 14. a theorem in geometry: the square of the length of the hypotenuse of a right triangle equals the sum of the squares of the lengths of the other two sides.
  11. 20. quadrilateral with four right angles
  12. 22. The angle above horizontal that an observer must look to see an object that is higher than the observer
  13. 23. has equal sides and every angle is a right angle (90°)
  14. 25. the product of two irrational numbers
  15. 29. A relationship of variation between two variables in which one is a constant multiple of the other