A complete book on the practice of triangle insertion origami

Triangular origami is done as follows:

1, first take out a piece of ordinary A4 paper. You can choose different colors of paper according to the color and style of the finished product you want.

2. Fold A4 paper in half along the short side of the paper, and rotate the paper so that the short side faces yourself.

3. Fold it in half again in this direction.

4. Fold in half in the above direction. This is the last folding.

5. Unfold the paper and rotate it so that its long side faces itself.

6. Then fold it in half along the long side.

7. Fold it again.

8. Unfold the paper and cut it into 32 squares along the crease.

9. Take out a square and make its long side face the maker.

10, transverse folding.

1 1, and then fold it vertically. Be careful not to fold it forcibly in this step.

12. Fold the right half of the paper upward so that the bottom edge and the middle crease overlap. The same is true on the left, and the final figure looks like an inverted house.

13. Turn the origami over and fold the outer corner down.

14, and then fold the upper two pieces down to get a triangle.

15, then fold it in half.

16. Fold many identical triangles according to the above method and then stack them together.

17, done.

Triangular insertion, also known as three-dimensional origami and 3D origami, is a kind of origami. First, make the paper into small triangular parts, and then use these small inserts to insert more styles of large items.