Let's begin from the triangle base form. Let's fold the two sharp corners to the direct. In result we have received the model, which I am declined to consider as the base form. Only from the classical models, submitted on the given site, four begin by this way. Besides the given model there is the bishop hat, the helmet and the lily.

Let's lift two corners upward and turn up them aside. Then we shall pass to the kirikomi, namely, we shall make the incision in one layer of the paper and turn up symmetrically to the top part. At last stage we shall give to a turtle the form, having hidden all superfluous.