双曲幾何学

pair, set, comparison, counter for pairs

ソウ / ふた

bend, music, melody, composition, pleasure, injustice, fault, curve, crooked, perverse, lean

キョク / ま.がる

how many, how much, how far, how long, some, several

キ / いく-

what

カ / なに

study, learning, science

ガク / まな.ぶ