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Verified answer
Bab LingkaranMatematika SD Kelas VI
a] Luas = 616
π x r x r = 616
(22/7) x r x r = 616
r² = 616 x 7/22
r = √196
r = 14 cm
b] Luas = 78,5
π x r x r = 78,5
3,14 x r x r = 78,5
r² = 78,5 : 3,14
r = √25
r = 5 cm