Diagrams: A New Brooch From a Regular Pentagon

Left: Arnold Tubis’s brooch, as originally designed, folded by Jane Rosemarin. Right, Jane’s locking variation with a color-change base, folded by Arnold Tubis. See PDF diagrams. Instructions for cutting a regular pentagon from a square are here.

Here is a postscript to the recently published series of polygonal brooches by Arnold Tubis. This new design differs in proportion and some detail from the previous brooches. The diagrams offer two methods for securing the flaps created when the points of the star are narrowed. They can be wet folded or glued in place (easy), or locked using an additional move (more difficult). The lock was designed by Jane Rosemarin.

The triangular and square variations folded by Arnold Tubis.

The folding sequence used to create the five-pointed new star, including the locked version, is easily applicable to six (or more)-pointed stars from regular polygons, and with some tweaks, to three- and four-pointed ones. from an equilateral triangle and square, respectively.

PDFs of Previously Published Brooches

Click on the links to download diagrams.

An Equilateral Triangle From a Square.
Brooch 1 From an Equilateral Triangle.
Brooch 2 From an Equilateral Triangle.
Brooches 3-7 From Equilateral Triangles.
Brooch 1 From a Square.
Brooch 2 From a Square.
A Regular Pentagon From a Square.
Brooch 1 From a Regular Pentagon.
Brooch 2 From a Regular Pentagon.
Brooches 3 and 4 From Regular Pentagons.
A Regular Hexagon From a Square.
Floral Brooch From a Regular Hexagon.
Brooch 1 From a Regular Hexagon.
Brooches 2 and 3 From Regular Hexagons.
A One-Cut Heptagon From a Square.
Seven-Pointed Star Brooch 1.
Seven Pointed Star Brooches 2 and 3.
A Regular Octagon From a Square.
Brooch 1 From a Regular Octagon.
Brooch 2 From a Regular Octagon.