A triangle containing a semicircle and a circular sector centred in the right vertex. What is blue : green?
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The dirty thirties
Tag: proportion
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Scratching the surface
Three tangent semicircles and two coloured triangles. What’s the proportion yellow : green?
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Family ties
Two regular pentagons share a vertex. What is the proportion red : green?
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Longing for spring
Four semicircles and three line segments. What’s the proportion yellow : orange?
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A light packing
A triangle containing two congruent squares. Each square has 1/3 the perimeter and 1/6 the area of the triangle. What’s the triangle side length proportion a : b : c?
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The seesaw
A regular hexagon with three diagonals and two line segments at right angles. What is the proportion green : yellow : blue : orange?
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The Zamani suggestion
Two regular hexagons share a vertex. What’s the area proportion red : yellow hexagon?
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Pushing the boundary
Two equilateral triangles are placed side by side. What’s the proportion green : red?
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Square one
Three squares share a vertex. Two line segments pass through side midpoints. Prove that a : b = c : d.
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Letting go
Two squares share a vertex. Three other vertices are collinear. What is the area proportion of the blue to the red square?