A square with two inscribed squares. What is the maximal proportion green : blue?
Two congruent right triangles on a common baseline have an overlap of variable size. What is the proportion of the minimal area to the maximal area?
A square containing a red square of variable size sharing a vertex with a blue rectangle. What is the maximal blue fraction?
A square of variable size inscribed in a semicircle of radius r. What is the maximum distance d of the lowest square vertex to the nearest semicircle corner?
Two isosceles triangles share a vertex. What is the maximum of their area proportion red/green?
A regular hexagon with an equilateral triangle sharing a vertex and having a vertex somewhere along the opposite side. What is the maximum length of line segment g?
A right triangle with three squares forming a smaller inner triangle. What is the maximal blue fraction?
Two squares of variable size share a vertex. What is the maximal blue fraction?
A triangle with an inscribed rectangle. What is the maximum red fraction?
If you roll a circle down a parabola, small circles can roll all the way down and up, whereas large circles get stuck between the sides at some point. What is the transition radius? In other words, what’s the maximum circle that keeps on rolling?