52C05 Lattices and convex bodies in $2$ dimensions [See also 11H06, 11H31, 11P21]
52C07 Lattices and convex bodies in $n$ dimensions [See also 11H06, 11H31, 11P21]
52C10 Erdös problems and related topics of discrete geometry [See also 11Hxx]
52C15 Packing and covering in $2$ dimensions [See also 05B40, 11H31]
52C17 Packing and covering in $n$ dimensions [See also 05B40, 11H31]
52C20 Tilings in $2$ dimensions [See also 05B45, 51M20]
52C22 Tilings in $n$ dimensions [See also 05B45, 51M20]
52C23 Quasicrystals, aperiodic tilings
52C25 Rigidity and flexibility of structures [See also 70B15]
52C26 Circle packings and discrete conformal geometry
52C30 Planar arrangements of lines and pseudolines 
52C35 Arrangements of points, flats, hyperplanes [See also 32S22]
52C40 Oriented matroids
52C45 Combinatorial complexity of geometric structures [See also 68U05]
52C99 None of the above, but in this section