A regular pentagon and a right triangle. What’s the angle α?
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Solution
The angle α is 36°.

A regular pentagon and a right triangle. What’s the angle α?
Scroll down for a solution to this problem.
The angle α is 36°.
A regular pentagon and a right triangle. What’s the angle α? https://t.co/twU6ecJpn8 Inspired by @puzzlist pic.twitter.com/4DYG0hj0Cu
— Mirangu (@Mirangu1) June 2, 2023
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Here a solution posted on Facebook (group: Geometria Super Top).