A quarter circle and a right triangle inside a square. One of the vertices of the triangle is the square’s centre. What fraction of the square’s area is green?

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## Solution

The green fraction is 1/10.

## Poem

A green zone

Can be a zone for freedom

For people and militaries

Or inhabitants who did not flee

Or better so called ecodistricts

To test sustainable strategies

With open spaces to impact fees

And recycling in multi-family

A zone with flexibility

Promised to sustainability