Mathematics Crossword

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Across
  1. 6. This instrument is used to measure angles.
  2. 7. The perimeter of a circle is called the _________.
  3. 8. {...-2, -1, 0, 1, 2, ...} is the set of ______.
  4. 9. The distance from the center to the perimeter of a circle.
Down
  1. 1. A Shape with only straight sides.
  2. 2. The best subject.
  3. 3. The set that contains all the elements that are common to both sets.
  4. 4. The value that appears most often in a set of data.
  5. 5. A part of a whole.
  6. 7. This is used to uniquely determine the position of a point on a graph.