A regular pentagon with two coloured triangles. What’s the proportion orange : blue?
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The orange pennant
Tag: pentagon
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Getting stuck
A regular pentagon and a circle through two of its vertices and its centre. What’s the angle α?
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Family ties
Two regular pentagons share a vertex. What is the proportion red : green?
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The antenna
A regular pentagon with an extended side. What’s the angle α?
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It’s all right
A regular pentagon with a diagonal and a right triangle. What’s the angle α?
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A clear vision
A circle containing a regular pentagon and two equilateral triangles. All shown points are on the circle. What’s the angle α?
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Projection bias
Two regular pentagons are placed side by side. What’s the proportion blue : green?
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The pentagon attack
Two regular pentagons and two diagonals. What’s the angle α?
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The three day stubble
A regular pentagon and a square share two vertices. What’s the angle α?
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Mickey Mouse
Three regular pentagons and two extended sides. What fraction of the total area is red?