Five equidistant parallel line segments. What’s the proportion green : red?
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The double helix
Tag: proportion
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The push-up
Two squares share a vertex. What’s the proportion x : y in terms of side lengths a and b?
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Three folds
A square divided by three line segments. What’s the proportion yellow : purple?
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Opposing camps
A square containing two overlapping equilateral triangles. What’s the length proportion a : b?
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Seeing double
Five circles, of which the green circles are congruent and so are the blue ones. If rblue : rgreen= 6, what’s rred : rgreen?
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The lever of Archimedes
Two congruent triangles are placed as shown. A line segment passes through the centroid of the yellow triangle. What’s the proportion a : b?
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Out of proportion
An equilateral triangle containing a parallelogram, another equilateral triangle and a circular arc that is tangent in its base vertices. What is the proportion pink : blue?
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Projection bias
Two regular pentagons are placed side by side. What’s the proportion blue : green?
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Check and balance
A square divided by three line segments. The red and blue areas are equal. What’s the length proportion a : b?
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Extreme parallelism
Four parallel line segments, one of which is divided in three parts. What is the proportion blue : red : green?