How to Make Tangram Shapes With Six Pieces
A tangram is a puzzle of Chinese origin made up of seven pieces called "tans." The most commonly seen tangram is to fit each of the seven pieces into a square. The seven pieces in the puzzle are five triangles of varying size, one square and one parallelogram. A variation of the tangram game with six pieces uses four triangles the same size and two differentsize chevrons. The chevrons add a degree of difficulty to an already difficult puzzle.
Things You'll Need
 6 tangram pieces
Square

Make a square from the six tangram pieces by placing two of the triangles together with the long sides touching to make a small square.

Place the larger chevron onto the square with the point of the chevron pointing away from the square.

Place the smaller chevron onto the point of the larger chevron.

Line the last two triangles with the long sides of the triangles against the chevrons to make the last two corners of the square.
Rectangle

Place one triangle with the top tip point up. Place one more triangle on the right edge of the first triangle with the tip touching the first triangle. Place a third triangle on the right side of the second with the tip of that triangle pointing down touching the tips of the other two triangles.

Insert the larger chevron with the tip pointing toward the top points of the triangles.

Insert the smaller chevron with the tip pointing toward the triangles and into the larger chevron.

Insert the last triangle with the tip of the triangle pointing into the smaller chevron.
Parallelogram

Place one triangle on the work surface with the tip pointing up.

Place another triangle against the right side of the first with the tips touching.

Place a third triangle against the long side of the second triangle.

Insert the tip of the third triangle into the larger chevron.

Insert the tip of the larger chevron into the smaller chevron. Place the last triangle with the tip pointing down against the top edge of the smaller chevron.
References
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