Two squares sharing a vertex. What’s the angle α?

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geometry puzzles to train your brain

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Two squares sharing a vertex. What’s the angle α?

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An equilateral triangle with three congruent squares. What’s the angle α?

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

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A square, a triangle and two equal angles. What is the angle α?

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A triangle containing two tangent semicircles. What’s the proportion α : β?

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A right triangle with two cevians. What’s the angle α?

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Two equilateral triangles inside a square. What’s the proportion green : orange?

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A white triangle in a blue square. What is it’s top angle α?

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The vertices of an equilateral triangle are connected to an interior point. What is the angle α?

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Two congruent equilateral triangles share a vertex. What is the angle α?