# Making a Rectangle from Different Didrafters

## Introduction

A *didrafter* is a polyform
made by joining two *drafters,*
30°-60°-90° right triangles,
at their short legs, long legs, hypotenuses, or half hypotenuses.
Polydrafters joined on the polyiamond (triangle) grid
are called *proper* polydrafters.
Polydrafters whose cells depart from the grid are called *extended*
polydrafters.
Here are the 13 didrafters, proper and extended:

Below I show how to arrange a set of different
didrafters to make a rectangle.
Some sets have more than one tiling.

## 1×√3

## 2×√3

## 3×√3

## 4×√3

## 5×√3

## 6×√3

## 3×2√3

## 4×2√3

Last revised 2020-07-08.

Back to Polyform Tiling
< Polyform Curiosities

Col. George Sicherman
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