Two overlapping equilateral triangles with side lengths 1. What is the total red length?
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Slightly skewed
Month: August 2022
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The same channel
Two circles and two common tangents. Prove that the blue triangle is isosceles.
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Overhanging rock
A rectangle with three line segments. What’s the proportion red : yellow?
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Le Petit Nicolas
Two parallel squares with four line segments connecting opposing vertices. Prove that they pass through a single point.
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Emerging from water
Two squares and an extended side. What’s red : green : pink?
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Angel wings
A circle with four chords and a diameter. What’s the proportion blue : green?
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The secret document
One corner of a rectangular piece of paper is folded back and forth to the opposite side. What is the proportion red : blue?
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The movie film
Four squares and two shared vertices. What fraction is blue?
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An irregular tiling
A triangle divided by three line segments. What fraction is blue?
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The guylines
Two squares and an extended side. What’s the angle α?