Jawabanmu

Jawaban paling cerdas!
2014-05-22T14:57:49+07:00
K = phi x D
1,32 = 3,14 x D
0,42 = D
r = 0,21

L = phi x r x r
L = 3,14 x 0,21 x 0,21
L = 0,139 m persegi