An equilateral triangle with an altitude. Two of its sides form the radii of the circular sector. What fraction of the area is covered by the red circle?
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Solution
The red fraction is 63/2-18√3, which is approximately 32,31%.

Poem
The red balloon
Flies to the moon
And even to the stars
In the sky so far
I cannot catch it, why ?
My hands are empty
The balloon feels so alone
I’ll soon take it home
This balloon in heaven above
Is mine,
I want his love
I’ll put a string
And hold it close and tied
