quads

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Across
  1. 3. diagonals bisect each other and are equal of this figure
  2. 4. these angles of parallelogram are equal
  3. 6. sum of all angles of triangles is 180
Down
  1. 1. this figure has all of its angles 90 degree
  2. 2. has two parallel sides and two non-parallel sides.
  3. 3. equal sides and diagonals bisect each other
  4. 5. these have a sum of 180 in parallelogram