Author Archives: insttheorystem
Riddle 15+
Riddle 14
Riddle 13
Riddle 12
Show that the traditional design for a soccer ball is Hamiltonian.
Riddle 11-
Construct a dodecahedron from more straightforwardly constructible regular polygons, as follows.
From a tessellation with multiple types of regular polygon tiles.
Riddle 10
Riddle 9
Find as many conceptually distinct interpretations as possible for Riddle 6’s factor of k = 4/3.
Which features there as the constant of proportionality in the medians’ counterpart of Heron’ formula.
Where else in Geometry do technically-related powers of k occur?
Riddle 8
Show that any triangle can be cut into 4 congruent triangles, each of which is similar to the original.
For which quadrilaterals can this be done?
Find a pentagon for which this can be done.
Riddle 7
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