Jawabanmu

2014-04-08T10:59:22+07:00
2014-04-08T12:07:55+07:00
(20)
tali = keliling lingkaran + 4 diameter
= 2πr + 4d
= 2 . 22/7 . 14 + 4 . 28
= 88 + 112
= 200 [b]

(21)
sisi = 6
d. ruang = 4 [c]