The domino effect

Two overlapping congruent rectangles. What’s the angle α?

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The angle α is 90°.

Solution by ʙᴇɴᴇ.


The Domino effect
Black and white
Fited together
Changing position every day
To feel better and better
You are my chain reaction
My habits and addictions
You are my goal
In life, with no exception
Never mind the plans for the moon
You are my butterfly effect
And my hearbeats too


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