Reuleaux triangle.

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dunlop stubby pick - reuleaux triangle. a shape of constant width.

The chubby pyramid

a shape of constant width.

wankel rotor. vintage model.

wankel rotor. vintage model.

Watts Bros square drill.

MW article about the Watts Bros floating chuck - Page 2

Applications of shapes of constant width. Drilling a square hole.

Applications of shapes of constant width. Drilling a square hole.

Reuleaux's triangular manhole covers. S.F. USA

Firstly, it is the shape with the highest possible area to volume ratio.


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