The yellow sailboat

A square, two equilateral triangles and an extended side. What is the proportion yellow : blue?

Scroll down for a solution to this problem.


Yellow : blue is 1 : 1.

Solution by Rony Sarker.

Visual solution

Proof without words by David Andriana.


The yellow sail boat
Will chase the waves
When the sun shines bright
It’s crossing the river and the bridge
Navigating up in the air
To the endless sky
The yellow sail boat is dancing
In spite of wind and storm
The boat feels well on the rolling sea
And hopes in the harbour be


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