An ellipse, two circles centred in its focal points, a chord and a tangent. What is the angle α?
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The lorgnette
Month: February 2023
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And rightly so
A regular hexagon with a diagonal and a right triangle. What fraction is orange?
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Count to five
A triangle with a cevian. What’s α?
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The manta ray
A quadrilateral with connected side midpoints. What’s blue : red : yellow?
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The truss bridge
Two lines connected by five triangles. Prove that orange = blue.
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The sandal
A triangle with two angular bisectors. What’s the proportion blue : red?
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The baboon
A square containing a square and an equilateral triangle. What fraction is pink?
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The orange pennant
A regular pentagon with two coloured triangles. What’s the proportion orange : blue?
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Sliding down II
A quarter circle and a square. What’s the angle α?
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The gate
Two equilateral triangles sharing a vertex and three line segments. Prove that the red triangle is isosceles.