Drag to rotate · Icosahedral subdivision · V − E + F = 2 (Euler's formula)
Buckminster Fuller's geodesic dome subdivides an icosahedron's triangular faces into smaller triangles, then projects onto a sphere. Frequency n means each edge is split into n segments: V = 10n²+2, E = 30n², F = 20n². For a closed sphere V−E+F = 2.