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<p>[QUOTE=&quot;chrisild, post: 1271255, member: 39&quot;]By the way, these Wikipedia articles explain the concept of such an &quot;equilaterally curved polygon&quot; quite nicely:</p><p><a href="http://en.wikipedia.org/wiki/Fifty_pence_(British_coin)" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://en.wikipedia.org/wiki/Fifty_pence_(British_coin)" rel="nofollow">http://en.wikipedia.org/wiki/Fifty_pence_(British_coin)</a> (fourth paragraph)</p><p><a href="http://en.wikipedia.org/wiki/Curve_of_constant_width" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://en.wikipedia.org/wiki/Curve_of_constant_width" rel="nofollow">http://en.wikipedia.org/wiki/Curve_of_constant_width</a> (for the mathematically inclined <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie2" alt=";)" unselectable="on" unselectable="on" /> )</p><p><br /></p><p>And yes, the current size of the half dollar coin would be a problem in pretty much every country. Then again, hardly any US coin, except the quarter maybe, actually circulates in the sense of being given in change and then spent as part of a payment again. And that is not a size issue but a question of habits, I think. So it does in my opinion not actually matter how &quot;handy&quot; or &quot;bulky&quot; the half or one dollar coins are ...</p><p><br /></p><p>Christian[/QUOTE]</p><p><br /></p>

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