Think 'quadri'laterally! :-)

123456789
Across
  1. 2. All ______ are rectangles.
  2. 7. A ____ has opposite sides equal.
  3. 8. The sum of the measures of all angles of any quadrilateral is always ____ degrees.
  4. 9. The sum of the measures of all angles of ___ triangles will be equal to the sum of the measures of all angles of a quadrilateral.
Down
  1. 1. Any polygon with ___ sides is quadrilateral.
  2. 3. A ____ has all sides equal.
  3. 4. A square can be divided into ___ congruent right angled triangles.
  4. 5. Every quadrilateral has four _____.
  5. 6. A _____ has opposite sides equal and parallel