TANGRAM

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Across
  1. 2. In the triangles of the tangram, the angles that except the right angles.
  2. 3. In tangram, the only shape that without right angle.
  3. 4. The type of triangles in tangram.
  4. 7. In tangram, the longest side of the triangles.
Down
  1. 1. In tangram, square and the parallelogram have this thing, but in triangles, there isn't this thing.
  2. 5. In tangram, the only shape that four sides are equal.
  3. 6. In the triangles of the tangram, the angles that except acute angles.