A square containing a quarter circle. What’s the proportion blue : brown : green?
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The pine forest
Tag: square
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The red sash
Two squares and a rectangle. What is area of the rectangle in terms of square sides a and b?
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The star gazer
A square divided by a diagonal and another line segment. What fraction of its area is purple?
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The Eightfold Path
A semicircle, a square and an isosceles triangle. What’s the angle α?
A semicircle, a square and a chord. If the square has area 32, what is the semicircle area?
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The chess board
A square is divided by six line segments. What fraction is brown?
A unit circle with an inscribed square and four semicircles. What’s the sum of the semicircle areas?
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As above, so below
A semicircle, a square, a triangle and two circles. A centre and a tangency point are highlighted. Prove that the circles are congruent.
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The sand heap
Two squares share a vertex. Three other vertices form a triangle, of which one side length is given. What is its area?
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The full circle
Two squares of area D and J share a vertex while the circle passes through four other vertices. What is the area of the latter in terms of D and J?