Jawabanmu

2014-05-30T17:35:45+07:00
Luas = pi x jar"
16 = 3,14 x jari"
jari= 16/3,14
jari" = 5,09

keliling= 2 pi x jari"
= 2x3,14x5,09
=31,9 cm2
2014-05-30T17:42:01+07:00
16cm^2 = 3.14 × TT^2
TT^2 = 16 / 3.14
TT^2 = 5.09


kel = 2 × 3.14 × 5.09
= 31.9