演示一下这个七巧板 3 4 和6 这几个板不能拼成什么图形：正方形 三角形 平行四边形；用视频做演示---Chart/Diagram Description: * **Type:** Geometric puzzle (Tangram). * **Overall Shape:** A large square formed by 7 pieces. * **Main Elements:** The square is divided into seven pieces, each distinctly colored and labeled with a number. * **Piece 1:** A large pink triangle. It occupies the top left corner area of the square. * **Piece 2:** A large yellow triangle. It occupies the bottom left corner area of the square. * **Piece 3:** A purple parallelogram. It is located below triangle 2 and to the left of triangle 7. * **Piece 4:** A small light blue triangle. It is located between triangle 1, triangle 2, square 5, and parallelogram 3. * **Piece 5:** An orange square. It is located to the right of triangle 4, below triangle 1 and triangle 6, and above parallelogram 3 and triangle 7. * **Piece 6:** A medium-sized green triangle. It is located in the top right area, between triangle 1 and square 5, and along the top edge. * **Piece 7:** A small green triangle. It is located in the bottom right corner area, below square 5 and next to parallelogram 3, and along the right edge. * **Labels:** Each piece is labeled with a black number centered within it: 1 (pink triangle), 2 (yellow triangle), 3 (purple parallelogram), 4 (light blue triangle), 5 (orange square), 6 (green triangle), 7 (green triangle). * **Lines:** Black lines divide the square into the seven pieces. These lines represent the edges of the puzzle pieces. * **Relative Position and Direction:** The pieces are arranged to form the overall square. Triangle 1 and 2 are the two largest pieces, forming the left half of the square diagonally. Square 5 and triangle 6 form part of the top right section. Parallelogram 3 and triangle 7 form part of the bottom right section. Triangle 4 is located in the center. * **Other Text:** Watermark text "TUKUPPT.COM" is visible across multiple pieces. No question stem, options, or other text related to a question is present in the image.