Three equilateral triangles and two line segments. Prove that the three red points are collinear.
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Napoleon strikes again
Month: August 2022
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An equitable portion
A square, its diagonals and a right triangle. What fraction is green?
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The leftward lean
Two triangles form a quadrilateral. What’s the total orange area?
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The new moon
A circle with two tangents, two chords and a secant. Prove that red and green are parallel.
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The wedge
A trapezium with its inscribed circle. Two tangency points are shown. What’s red / blue – yellow / green?
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The fish trap
Two intersecting circles and two common tangents. Prove that α = β.
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Eternal snow
A triangle with two angle bisectors. What fraction of its area is green?
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The green deal
Three squares, one of which has a side length of 2. What is the green area?
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Lines in the sand
Two intersecting circles and four chords. Prove that the red chords are parallel.
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The high seas
A rectangle containing four triangles. What is the total area?