[] Ƴ Ǭ ް Ǿµ, ֳ?
[亯] б ν Ӿ ֽϴ.
[ؼ漳]
Ͽ ӱڰ ӿ Ǵ , Ͽ ӱڶ Դϴ(ι 1112). ٸ ʹ ӵǾ ڽ п ġ ϴ ް Ǹ п ѵ ȯ û ֽϴ(1115).
ü 캸, ( ڳ) Ӻ 1/2, ڴ Ӻ 1/2, ( θ) Ӻ 1/3, ڸŴ Ӻ 1/3 Դϴ(1112).
Ӱ Ӽ Ƿ ڴ Ӻ 1/2 ϴ. Ӻ ϴ. Ƴ Ƶ ΰ , 7̶ , 켱 Ӻ (Ƶ) Ӻк 5 ϰ ˴ϴ(1009). Ƴ:峲:= 1.5: 1: 1= 3: 2: 2 ̹Ƿ Ƴ Ӻ 3/7̰ й 3(= 73/7) ˴ϴ. Ӻ 3̹Ƿ ڴ 15õ (= 31/2) ް ˴ϴ. 峲 15õ ȯ û ֽϴ.
[ ι 1009; 1112; 1115 ]