Equidissection 1970-01-01
Erdős distinct distances problem 1970-01-01
Erdős–Diophantine graph 1970-01-01
Hadwiger conjecture (combinatorial geometry) 1970-01-01
Hinged dissection 1970-01-01
Honeycomb conjecture 1970-01-01
Integer triangle 1970-01-01
Integrally convex set 1970-01-01
Isosceles set 1970-01-01
Kakeya set 1970-01-01
Kepler conjecture 1970-01-01
Kissing number 1970-01-01
Kobon triangle problem 1970-01-01
Lebesgue's universal covering problem 1970-01-01
List of shapes with known packing constant 1970-01-01
McMullen problem 1970-01-01
Moser's worm problem 1970-01-01
Mountain climbing problem 1970-01-01
Moving sofa problem 1970-01-01
Napkin folding problem 1970-01-01