How many triangles are there in a five piece tangram set? Are they equal in size?

Number the pieces in each of these figures according to the numbering in the tangram puzzle.

Number the pieces in each of these figures according to the numbering in the tangram puzzle.

Number the pieces in each of these figures according to the numbering in the tangram puzzle.

Number the pieces in each of these figures according to the numbering in the tangram puzzle.

Number the pieces in each of these figures according to the numbering in the tangram puzzle.

There are some shapes that cannot be used to make tiling patterns.

Why? What are they? Name them and give reasons.

Complete the following tiling pattern.

Complete the following tiling pattern.