Jawabanmu

2014-06-04T15:47:36+07:00
L.lingkaran=phi.r²
346=22/7.r²
r=√346/22/7
r=√346.7/22
r=√2422/22
r=√110.1
r=10.5

k=2.phi.r
k=2.22/7.10,5
k=11.22/7
k=34.57