Vocabulary choice board

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Across
  1. 8. a number on its own
  2. 11. the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse
  3. 12. an algebraic expression of three terms
  4. 13. the length of any great circle, the intersection of the sphere with any plane passing through its centre
  5. 17. the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.
  6. 19. a symbol and placeholder for a quantity that may change, or any mathematical object
  7. 22. a way that the term with the highest degree is placed first
  8. 23. all the real numbers which are not rational numbers
  9. 24. a whole number; a number that is not a fraction.
Down
  1. 1. is the highest of the degrees of the polynomial's monomials with non-zero coefficients
  2. 2. algebraic expression with only two terms
  3. 3. a numerical or constant quantity placed before and multiplying the variable in an algebraic expression
  4. 4. a number that can be expressed as the quotient or fraction of two integers
  5. 5. the boundary of a closed plane figure
  6. 6. a number or algebraic expression that divides another number or expression evenly
  7. 7. an algebraic expression consisting of one term
  8. 9. a single mathematical expression combination of symbols that is well-formed
  9. 10. a single mathematical expression
  10. 14. the amount that something can produce
  11. 15. combination of symbols that is well-formed
  12. 16. expressions that may contain variables of varying degrees, non-zero leading coefficients, positive exponents, and constants
  13. 18. The expression inside the radical sign the sign √ which indicates the square root of the number following or a higher root indicated by a preceding superscript numeral
  14. 20. a number without fractions; an integer
  15. 21. the amount of space that a substance or object occupies