A triangle containing a semicircle and a circular sector centred in the right vertex. What is blue : green?
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The dirty thirties
Tag: area
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Scratching the surface
Three tangent semicircles and two coloured triangles. What’s the proportion yellow : green?
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The seventh bell
A regular hexagon shares a vertex with an equilateral triangle of area 7. What is the area of the hexagon?
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Longing for spring
Four semicircles and three line segments. What’s the proportion yellow : orange?
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The common ground
Two squares share a vertex. Two other vertices are 4 units apart. A third green square has the centres as opposite vertices. What is its area?
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Rising bread
A regular hexagon with a diagonal and a circular arc centred in a side midpoint. What fraction is yellow?
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The double bottom
A regular hexagon and a square share a vertex. What is the area proportion square : hexagon?
A square contains a yellow right triangle with an area of 11. What is the square’s area?
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Black and blue
A square with an extended side inside another square. What fraction of the latter is blue?
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Almost sunk
A square contains a right triangle. What fraction is red?