Vesicula & Vesica Piscis - Proportions
Today, following a polytopia post, I happened upon a website with the proportions of the vesicula (a term coined by colleague Aya who I met in Sedona in February 2004 with his fabulous large mandala canvases.) The "vesicula" is the "sliver" composed of two back-to-back sides of the 3-sided Reuleaux Triangle...

I confirmed the proportions here (using the URL above; the proportion is 4: (2*(4-4cos30)) which is
1.0717968, so simplifying by dividing both sides by 4 (to give the proportion for a circle with radius =1);
1Sad2*(1-cos30)) = .2679492 (according to my calculator)... Another proportion to add to the list of somehow cosmically significant proportions! I have a
diagram which shows the area calculations for the more familiar Vesica Piscis, which has a square root of 3 proportion, in terms of its aspect ratio.

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