A square, two equilateral triangles and an extended side. What is the proportion yellow : blue?
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The yellow sailboat
Tag: square
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Mondriaan II
A square contains three squares (black sides), one of which has an extended side (blue). What is the proportion yellow : blue?
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Warning triangle II
A square, a triangle and two equal angles. What is the angle α?
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The inner sanctum
A square with four congruent equilateral triangles. What fraction is yellow?
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Marble box II
Two squares, three circles and a common tangent. What fraction is coloured?
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Out of the box
Two squares and two given areas. What’s the total area?
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Connecting the dots
Three squares share three vertices which form a right triangle. Their centres are connected to form another triangle of which one side is given. What’s the blue area?
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The Magdeburg hemispheres
A square containing a circle and two semicircles, all three having the same radius. What fraction is purple?
Five unit squares inside a larger square. What is the total area?
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A full house
Two large squares and three smaller ones of side length 5 are placed as shown. What is the pink area?