Jawapan

2014-07-22T19:10:44+08:00
First, mau cari radius dulu.

Jadi, radius = lilitan divide 2 \pi  
                  = 66 over 2 × 22 per 7
                  =  (radius) cm

Mau cari diameter, jadi tu calculation  tadi kali 2 because 2r is diameter.

after that, jawapan suda lh...

hope this helps.