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Twin balls

A semicircle with two inscribed circles tangent to an altitude. What’s the angle α?

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Solution

The angle α is 45°.

Solution by ohmohm.

Poem

Twin balls
Orange and blue
The Twins are two
They are so cool,
They are so smart
And being so good in their heart
They are the energy of their souls
Both cuddly balls have fun
Together they laugh,
Skip out and run
The twin balls are a gift, a joy
Together they don’t annoy

Bella

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