TANGRAM

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Across
  1. 4. In the tangram, just have one this part,it is not parallelogram..
  2. 5. In a isosceles right triangle,the longest side length of an right triangle.
  3. 6. In a parallelogram,line segments that do not cross each other.
  4. 7. In a isosceles right triangle,there is an angle that is 90 degrees,it called____.
Down
  1. 1. In a isosceles right triangle,there are two angles that are less than 90 degrees,they called_____.
  2. 2. In the tangram,there are 7 parts,five of them are____.
  3. 3. In the tangram, just have one this part,it is not square.