A white triangle in a blue square. What is it’s top angle α?
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Solution
The angle α is 45°.
This solution makes use of the RHS theorem.
Visual solution
Poem
A good spot for surfing
At the sea where it’s so tempting
To surf is not easy
For perfect waves a champion is searching
He dreams from waves and from riding
He glides on the board
As sharp as a sword
It gives good feelings
On the top of the waves
He’s on the top of the world
