Jawabanmu

2014-05-02T19:12:36+07:00
L=phi.r^2
616=22/7.r^2
r^2=616:22/7
r^2=616.7/22
r^2=7.28
r=√196
r=14 cm

k=2.phi.r
k=2.22/7.14
k=2.22.2
k=88 cm
2014-05-02T19:17:27+07:00
L = π×r×r 616 = 22/7×r kuadrat 616 : 22/7 = r kuadrat 616 × 7/22 = r kuadrat r = √196 r = 14. ditanya = keliling. K = 2πr K = 2.22/7.14 K = 88 cm.
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