SELECT h3_rads_to_degs(h3_degs_to_rads(90.45));

SELECT h3_hex_area_km2(10);
SELECT h3_hex_area_m2(10);

SELECT h3_edge_length_km(10);
SELECT h3_edge_length_m(10);

SELECT h3_num_hexagons(0);
SELECT h3_num_hexagons(15);