Tipping point II

Two regular pentagons share a vertex. What’s the angle α?

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Solution

The angle α is 54°.

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Two regular pentagons share a vertex. What’s the angle α? https://t.co/OmLtXj1n9D pic.twitter.com/MsUNN40qof
— Mirangu (@Mirangu1) July 24, 2024