Enneagon Dissections
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|
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| 5/2 |
6/2 |
7/2 |
7/3 |
8/2 |
8/3 |
9/2 |
9/3 |
9/4 |
10/2 |
10/3 |
10/4 |
12/2 |
12/3 |
12/4 |
12/5 |
| 14
| 11
|
|
| 15
| 13
| 19
| 19
|
| 17
|
|
| 14
|
|
|
|
|
Triangle — Enneagon (8 pieces)
This dissection makes use of the TT2
technique.
Previously Ernest Irving Freese found a 9 piece
solution to this dissection.
In Harry Lindgren’s book
he states “The conclusion is that if you can beat Freese, you will
have found a needle in a haystack”. I found the needle! This was one of the
first dissection improvements that I found, and I am particularly pleased with
it.
Square — Enneagon (9 pieces)
This was first dissected in 12 pieces by
Ernest Irving Freese.
The first of these two dissections was my first solution of this dissection.
It is a PP dissection. It
suffers from having several short straight lines that do not show up clearly
in diagrams of this size. Click on the diagrams to see an enlargement. The second
solution is much more elegant.
It is a TT2 dissection.
Pentagon — Enneagon (10 pieces)
Hexagon — Enneagon (11 pieces)
Hexagon — Enneagon (10 pieces with 1 turned over)
Heptagon — Enneagon (13 pieces)
Octagon — Enneagon (12 pieces)
Enneagon — Decagon (13 pieces)
Enneagon — Dodecagon (14 pieces)
Enneagon — Dodecagon (13 pieces with 3 turned over)
Enneagon — Octadecagon (19 pieces)
Enneagon — Pentagram (14 pieces)
Enneagon — Hexagram (11 pieces)
Enneagon — Octagram {8/2} (15 pieces)
Enneagon — Octagram {8/3} (13 pieces)
Enneagon — Enneagram {9/2} (19 pieces)
Enneagon — Enneagram {9/3} (19 pieces with 9 turned over)
Discovered by Greg Frederickson (2002).
Enneagon — Decagram {10/2} (17 pieces)
Enneagon — Dodecagram {12/2} (14 pieces)
Enneagon — Octadecagram {18/2} (17 pieces)
Enneagon — Silver Rectangle (9 pieces)
Enneagon — Golden Rectangle (9 pieces)
Enneagon — Domino (9 pieces)
Enneagon — Optimised Rectangle (7 pieces)
Enneagon — Greek Cross (11 pieces)
Enneagon — Latin Cross (10 pieces)