Octadecagon

Where (in America) can you see an octadecagon?

On a soft bolt head when I'm trying to remove it .

I should add that the octadecagon isn't regular, but is regularly seen.

Jim Ward schrieb:

Mainly in America (USA) only? Is it to do with money? Is the octadecagon convex?

You may wait a while before answering these. A guess follows below.

Michael

S P O I L E R

S P A C E

S P O I L E R

S P A C E

If you print 'America' in Courier, the outline of the letter A is an irregular octadecagon.

Pete Munro wears one.

No.

That's too much of a clue, at least for baseball fans.

Department of Mathematics http://www.math.ubc.ca/~israel University of British Columbia Vancouver, BC, Canada

Jim Ward schrieb:
http://mlb.mlb.com/hou/espanol/images/db_photos/roster/ na.gif

Hmm, I'd debate that...

I still think that better, but that may be because I read my news in Courier...

Anyway, I spotted 4 similar irregular concave white decagons on an official emblem; one could also consider them a single Octaicosagon, or possibly a dodecagon and a hexadecagon, all white and concave. What is the emblem?

Cheers