Jawabanmu

2014-01-14T19:33:25+07:00
K=π D
22/7 . 2,8 =8,8

k=π D
22/7 .35=110
2014-01-14T19:35:39+07:00
A. K= 2 . pi . r atau K= pi . d
K= 22/7 . 2,8 = 8,8 cm

b. K= 22/7 . 35 = 110 m