Jawabanmu

Jawaban paling cerdas!
2014-04-22T11:26:45+07:00
K1=2πr=2×22/7×21=132 K2=2×22/7×49=308 Perbandingan K1:K2=132:308=3:7
1 5 1
2014-04-22T11:27:09+07:00
K1 : K2 2.phi.r1 : 2.phi.r2 r1 : r2 1 : 49