The HOW 

The How is made of 3 gnomon triangles. Several joined together make a simple 3D object.
technically the shape is formed from the intersection of three blades to create an equilateral triangle on a fourth blade.
The How is made of 3 gnomon triangles. Several joined together make a simple 3D object.
technically the shape is formed from the intersection of three blades to create an equilateral triangle on a fourth blade.