Two squares share two vertices. A line segment connects two other vertices, forming the base of three triangles. What is the proportion green : white : red?
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Il tricolore
Tag: triangle
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Stuck in the middle
A right triangle with semicircles along its perpendicular sides having lengths a and b. Two smaller inscribed circles. What is the proportion blue : red in terms of a and b?
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The drunk spider
A circle with several chords forming four coloured triangles. What is the proportion yellow : purple?
A triangle is divided in three smaller triangles. What is the proportion yellow : green?
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Eye of the apple
A circle with an inscribed triangle with an inscribed circle. The centre of the large circle is on the small one. What fraction of the area is blue?
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The ice cream cone
A circle tangent to a triangle side and to the two other extended sides. What is its diameter?
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Similar intention
A cyclic quadrilateral and two diagonals. What fraction of its area is blue?
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The glass piece
A square and an overlapping isosceles triangle. What is the angle α?
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The red flag
Three squares of which two vertices are connected. If the red triangle has area 1.5 and the green square area 1, what is the side length x?
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The common point
Two equilateral triangles share a vertex. What’s the angle α?