Jawabanmu

Jawaban paling cerdas!
2014-02-13T12:17:48+07:00
A.) L= π D
254.34 Cm2 = 3.14 * d
d = 254.34 Cm2 : 3.14
d= 81 cm atau r = 9

B.) K= 2πr
K= 2* 3.14* 9Cm
K= 56.52 Cm3
1 5 1
2014-02-13T12:20:27+07:00
254,34 = 3,14.pi2 254,34/3,14 = pi2 81 = pi2 9 = pi d = 18 =2.3,14.9 =18.3,14 =56,52