Jawabanmu

2014-05-20T18:45:14+07:00
L=phi.r^2
=22/7.14.14
=616 cm^2
K=2.phi.r
=2.22/7.14
=88 cm
2014-05-20T18:48:37+07:00
Luas = πr² =  \frac{22}{7} x 14 x 14 = 616 cm²
Keliling = 2πr = 2 x  \frac{22}{7} x 14= 88 cm
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