Penton is pentagon. It is most interesting orthogon among the 12s. It is confused me a long time for the ratio. I think the wiki ration might be wrong as I mentioned before. To check all the possible rectangle, the most like one is that the dark blue one in the picture. You can see it is same with 4 small rectangles. So the Bipeton has two possibilities also: one is 70° and another is 55.5°. this will explain the penton ratio reasonably.
2010年12月19日星期日
12 orthogons---part 5: Penton
Penton is pentagon. It is most interesting orthogon among the 12s. It is confused me a long time for the ratio. I think the wiki ration might be wrong as I mentioned before. To check all the possible rectangle, the most like one is that the dark blue one in the picture. You can see it is same with 4 small rectangles. So the Bipeton has two possibilities also: one is 70° and another is 55.5°. this will explain the penton ratio reasonably.
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