Two squares, three circles and a common tangent. What fraction is coloured?
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Two squares, three circles and a common tangent. What fraction is coloured?
Two squares and two given areas. What’s the total area?
A right triangle with two cevians. What’s the angle α?
A semicircle is inscribed in a quarter circle. What is the minimal yellow fraction?
Three squares share three vertices which form a right triangle. Their centres are connected to form another triangle of which one side is given. What’s the blue area?
Two parallel lines support two rectangles. Prove they have equal area.
An equilateral triangle inscribed in a circle is divided by a diameter parallel to one of it’s sides. What is the proportion light : dark blue?