A square, a rectangle and two semicircles, one of which is centered in the shared vertex. What is yellow : blue?
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Unity
Tag: square
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The Gakopoulos proportion
Two concentric quarter circles and a square. What is purple : red?
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Brick oven II
A rectangle inside a square. What fraction is yellow in terms of x?
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Spiegel im Spiegel II
A square containing a square with two extended sides. What is the blue fraction?
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A mild temperature
Two squares and a diagonal. What’s the angle α?
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Slip sliding
Two squares share a vertex. The shown vertex can lie anywhere on the lower side. What is the maximum of red/blue?
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Centre of attraction III
Three congruent squares and an equilateral triangle. What is blue : orange?
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Communicating vessels
A semicircle and two squares. What is the blue area in terms of a and b?
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Equal partition
A rectangle and a square with an extended side. Prove that their areas are equal.
Categories
Roll the dice
Two squares inscribed in a rectangle. What fraction is purple?