Think-Tak-Toe

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Across
  1. 4. The operation that reverses the effect of another operation.
  2. 7. 2 sides of a right triangle that make up the right angle.
  3. 8. Parts in an expression that are added or subtracted.
  4. 9. square this to get your answer (X2-X1)2+(Y2-Y1)2
Down
  1. 1. Letter that represents an unknown number.
  2. 2. Always the longest side of a triangle and is opposite the right angle.
  3. 3. inequalities that involve linear operations.
  4. 5. To replace a letter with number or algebraic expression.
  5. 6. To wright an expression in simplest form.