A regular hexagon and two equilateral triangles share a vertex. What is the area proportion blue : yellow?

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## Solution

The proportion blue : yellow is 3.

First, draw the diagonal EB. Since ∠FEB is 60°, it is easy to show that ∠FEI=∠BEK. Since also ∠IFE=∠KBE=60°, it follows from equal angles that △FIE and △BKE are similar.

Now, because |BE|=2|FE| it follows that |KE|=2|IE|. The yellow equilateral triangle thus is 1/4 of the yellow-blue one. The proportion follows.

## Poem

The pyramid is swinging

And the old stones are dancing

In a sand beach surrounding

Saqqara with Gizeh is meeting

And skylights are shining

The old stones are laughing

Cause in the dark they are feeling

Happy and in love together choreographing

A great love story beginning