Jawabanmu

2014-02-22T14:37:49+07:00
K = 2 phi r
619 = 2 x 22/7 x r
r = 619 x 7/44
r = 98,47
 atau
k= 2 phi r
619 = 2 x 3,14 x r
619= 6,28 x r
r = 98,5
2014-02-22T14:40:46+07:00
2πr = 619
2 x 3.14 x r = 619
r x 6.28 = 619
r = 98.6 cm
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