A rectangle containing four triangles. What is the total area?
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The high seas
Category: Beginner
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Overhanging rock
A rectangle with three line segments. What’s the proportion red : yellow?
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The movie film
Four squares and two shared vertices. What fraction is blue?
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The guylines
Two squares and an extended side. What’s the angle α?
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The England win
A unit square containing two red overlapping congruent rectangles. If they cover exactly half the square’s area, what is their width x?
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True colours
In this right triangle, if red = blue, what is orange : purple?
Three semicircles and a circle. Three centres are shown in green. What’s the proportion red : blue?
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The remote corner
A square and a circle. What is the green area?
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The glass ceiling
Three squares, two of which share a vertex. What is the total area?
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Three folds
A square divided by three line segments. What’s the proportion yellow : purple?