# Tiling a Chamfered Rectangle with Two Tetraboloes

## Introduction

A *tetrabolo* or *tetratan*
is a plane figure formed by joining four equal isosceles right triangles
at their legs or hypotenuses.
Here are the 14 tetraboloes, with Erich Friedman's names:

A *chamfered rectangle* is a rectangular polyabolo
with its corner cells clipped diagonally.
To prevent cuts from meeting, I require the dimensions of the rectangle
to be 3 or greater.

Here I show the minimal known chamfered rectangle
that can be tiled by a pair of tetraboloes, using at least one copy
of each.

See also

## 5 Tiles

## 8 Tiles

## 14 Tiles

## 17 Tiles

## 20 Tiles

## 38 Tiles

## 54 Tiles

## 71 Tiles

## 76 Tiles

Last revised 2024-04-10.

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Col. George Sicherman
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