# Stelo

**Stelo**
is Jacques Ferroul's set of 12 pieces, which he calls the
*triapons.*
A triapons is formed by joining three cells on the polydrafter grid.
Each cell may be an equilateral
triangle, a *moniamond,*
or an isosceles triangle with base angles of 30°, a *monopons.*

These are the 12 triapons:

Polyiapons may be regarded as a special case of proper polydrafters.
In particular, the triapons are hexadrafters.

*Stelo* is Esperanto for star.
Ferroul named the set in memory of his grandniece Maïlou.

A Lucite set of Stelo is available from Kadon
Enterprises.

A set of three identical shapes is called *triplets.*
Stelo can form 17 sets of triplets.
The number below each triplet shows the number of distinct tilings.

A set of two identical shapes is called *twins.*
Stelo can form 19 sets of convex twins.
The number below each twin shows the number of distinct tilings.

Last revised 2021-02-08.

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Polyform Curiosities

Col. George Sicherman
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