A square containing three smaller squares and a quarter circle. What fraction is orange?
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The douche cabine
Category: Beginner
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The quarter trampoline
A quarter circle with two chords of given length. What is the area of the orange quadrilateral?
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Outside the hive
A regular hexagon and two squares. What’s the angle α?
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Egg basket II
What fraction of the regular hexagon is yellow?
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Draw the line
A square and an equilateral triangle inside a right triangle. Prove that the three red vertices are collinear.
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Another angle
Three congruent squares share three vertices. What’s the angle α?
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The Czech flag
A square is divided in three parts. What fraction is red?
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Three’s a crowd
Four equilateral triangles. Prove that the red quadrilateral is a parallelogram.
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Ice cube II
A square with an extended side. What’s the angle α?
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Sailing by night
A circle with an inscribed quadrilateral. Prove that ab=cd.