Ice cube

A rectangle and a square. What is the proportion purple : blue?

Scroll down for a solution to this problem.


The proportion purple : blue = 2 : 1.

Solution by John Michael.

Visual solution

Solution without words by David Andriana.

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One reply on “Ice cube”

There seems to be a gap in John Michael’s solution: Where does the angle of 22.5° come from?
Here is a way:

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