Three congruent rectangles on a line. What’s the angle α?
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The falling pillar
Author: Rik D. Tangerman
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The see-through triangle
A regular hexagon and an equilateral triangle share a vertex. What is red : blue?
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Guylines II
A square, two orthogonal axes and two angles. What’s the proportion α : β?
A triangle with two line segments. What’s the angle α?
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Le col bleu
A square with two line segments. What fraction is blue?
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Yeah, right!
A regular pentagon with three line segments. What’s the angle α?
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Go Orange
A regular hexagon, two diagonals and an orange equilateral triangle. What’s blue : orange : red?
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Night mountain
A rectangle containing three line segments. What fraction is blue?
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Pink parallels
A pink parallelogram with two extended sides. What’s α : β?
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By coincidence
Three squares and a circle. Prove that the red point is on two squares and the circle.