Basic tutorial on triangular origami - how to add corners. Friends who are new to triangular folding can learn about it. Basically, you will know how to add it after just one look. It is very simple~?
What is an added angle? Adding a triangle between the two triangles in the second circle is called an added angle. Use the two openings of another triangle to fix the two sharp corners that are adjacent to the second circle.
Fix the other sharp corner with the same angle.
Repeat the steps to complete the second corner.
This is a picture of 6 added corners, the 4th circle is completed.