Pyramid Creation Log

Obtuse Triangular Pyramid

A flattened triangular pyramid whose apex solid angles are all 90 degrees. It is used as a fundamental element for forming the vertices of cubes and rectangular prisms.

Acute triangular pyramid

A slender triangular pyramid with a sharply elongated apex, offering strong structural stability. On its own, it is well suited for creating horn-like forms. By combining multiple units, it can be extended into solid structures such as cubes and square pyramids, making it a highly versatile structural element.

Composite Square Pyramid

A square pyramid with a sharply pointed apex. It can be constructed by combining four triangular pyramid units using a twisting fold. A frame-like structure forms inside the shape, giving it high structural strength.

Hollow Square Pyramid

A square pyramid with a hollow interior. Its height can be adjusted by changing the amount of paper used.

Collapsible Triangular Pyramid

A structure formed by vertically compressing an obtuse triangular pyramid using a three-dimensional sink-fold technique. The three-dimensional sink fold becomes a locked fold, resulting in a stable structure.

Asymmetric Triangular Pyramid

A triangular pyramid formed by deforming an obtuse triangular pyramid using a three-dimensional twisting fold. Its defining feature is a left–right asymmetric structure.

Octagonal Pyramid

A hollow pyramidal structure with a regular octagonal base. By adjusting the finishing folds, the apex angle can be narrowed, allowing the tip to become sharper.

Hexagonal Pyramid

A structure made by dividing each face of an obtuse triangular pyramid into two, transforming it into a hexagonal pyramid. By using locking folds, the shape can be maintained without glue.An early work in which I discovered that a polygon component can also be formed using a 22.5-degree system, rather than a grid-based structure.

Open Square Pyramid

An open square pyramid with unfilled faces, consisting only of its skeletal structure.

Semi-Filled Square Pyramid

A development of the Open Regular Square Pyramid, featuring a regular square pyramid with partially covered faces.