圓柱體有多少條棱?

圓柱體有無數的棱
因為圓形是由無數的直線組成的


(以上資料全人手打字，嚴禁抄襲!!)

If you calculate it as degree, you can think it as 360s (Every 1 degree for one line). But you think it as a smooth surface, you cannot calculate it.