A regular hexagon, a circle through its red centre and two line segments. What’s blue : orange?
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Tilted hourglass III
Tag: area
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Flying purple people eater
What is the area of the purple people eater, in terms of the lengths AD and BC?
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Primary colours
An equilateral triangle inside a rectangle. What is red : yellow : blue?
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Running man
What is the area of the coloured figure? Can you determine the area without counting the number of squares in each different-coloured shape?
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The party hat II
An equilateral triangle with a circular arc through its red centre and two vertices. If the yellow area equals the green one, what’s the angle α?
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The lighthouse
A parallelogram and four equilateral triangles. What is yellow : green?
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Tip of the veil
A square with two right angles. What fraction is yellow?
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Three dome home
How does the white area inside the big semicircle compare to the combined white areas of the 3 smaller semicircles below it? Equally coloured semicircles are congruent.
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The hex division
A regular hexagon with two diagonals and two perpendiculars. What’s red : yellow?
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The owl of Ceva
A triangle with three concurring cevians. What’s orange : blue?