Maths Crossword Puzzle

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Across
  1. 2. A polygon in which all sides are equal.
  2. 4. Numbers like 1, 4, 9, 16, ... are known as __________ numbers.
  3. 5. A quadrilateral with opposite sides parallel and equal.
  4. 8. Polygon with four sides.
  5. 9. A polygon that has seven sides.
Down
  1. 1. A number when multiplied by its ______ gives one.
  2. 2. A number that can be expressed in the form p by q, where q is not zero.
  3. 3. The chance of an event happening.
  4. 6. A condition on an expression is called ______.
  5. 7. Equation with only one variable and the highest power one.