Jawabanmu

2014-06-03T20:19:03+07:00
Kel. lingkaran = phi x D
6,28 = 3,14 x D
6,28 : 3,14 = D
2= D
r = 1
2014-06-03T20:19:24+07:00
Kll = π x d
6,28 = 3,14 x d
d= 6,28/3,14
d=2m
r= 1m