Math 8 Crossoword

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Across
  1. 2. The amount of space a 3D object occupies (e.g., V = lwh for a rectangular prism).
  2. 7. number: A number that cannot be written as a simple fraction; its decimal form is nonrepeating and nonterminating (e.g., √2, π).
  3. 8. The point where a graph crosses the y‑axis (x = 0).
  4. 9. Shapes that are the same shape and size; corresponding sides and angles are equal.
  5. 12. equation: An equation whose graph is a straight line, usually written y = mx + b.
  6. 15. A ratio expressed out of 100; e.g., 25% = 25/100 = 0.25.
  7. 16. Two shapes have the same shape but not necessarily the same size; corresponding sides are proportional.
  8. 18. area: The total area of all faces/surfaces of a 3D solid.
  9. 19. number: A number that can be written as a fraction a/b where a and b are integers and b ≠ 0.
Down
  1. 1. A relation where each input (x) has exactly one output (y).
  2. 3. value: The distance of a number from zero on the number line; written |x| and always nonnegative.
  3. 4. The set of all possible input values (x) for a function.
  4. 5. A whole number or its negative (… −3, −2, −1, 0, 1, 2, 3).
  5. 6. theorem: In a right triangle, a^2 + b^2 = c^2, where c is the hypotenuse.
  6. 10. The set of all possible output values (y) for a function.
  7. 11. The rate of change of a line; rise over run (change in y ÷ change in x).
  8. 13. form: A way to write a linear equation as y = mx + b, where m is slope and b is y‑intercept.
  9. 14. (in an expression): A number, variable, or product of numbers and variables separated by + or − in an expression.
  10. 16. notation: A way to write very large or small numbers as a × 10^n where 1 ≤ a < 10 and n is an integer.
  11. 17. relationship: A relationship where y = kx for some constant k; graph is a line through the origin.