Jawabanmu

2014-06-16T08:19:55+07:00
L=πr²
346,5=22/7 x r²
110,25=r²
r=10,5 cm
K= 2πr
=2x22/7x10,5
=66 cm
2014-06-16T08:21:04+07:00
L=phi.r^2
346,5= 22/7.R^2
R^2 =346,5.7/22 = 110,25
R = 10,5 cm
K= phi.2.R
= 22/7.2.10,5
=66 cm