# Tiling a Blunt Pyramid with Two Polyominoes

## Introduction

The May
2006 issue
of Erich Friedman's *Math Magic*
presented tilings of triangular, pyramidal, and
diamondic polyominoes.
The term *pyramid* normally defines a shape in solid geometry.
Here it is used to distinguish
a triangular polyomino with two oblique sides from one with only one.
Here are examples of these shapes:

Below I show minimal known pyramids with two cells at the apex
that can be tiled by two given polyominoes.
Unlike such shapes as those shown above,
blunt pyramids have balanced cell parity.
They can be tiled by some pairs of polyominoes with balanced cell parity.

Any pair of polyominoes that can tile a triangular polyomino,
such as the red polyomino above,
can tile a blunt pyramidal polyomino.

Shown below each tiling are its height and area.

I omit pairs in which one polyomino is the monomino.

## Index

*Last revised 2023-10-15.*

Back to Polyomino and Polyking Tiling
< Polyform Tiling
<
Polyform Curiosities

Col. George Sicherman
[ HOME
| MAIL
]