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One shape goes through three holes : square, circle, triangle.

作者：Vincent Pantaloni

主題：圓, 等腰三角形, 正方形, 三角形

I made a real toy out of it. :)

I made a real toy out of it. :)

As seen on Twitter.

Compare with this other solid.

geogebra.org/m/znyms8tp

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