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= 22/7 x jari-jari kuadrat
616 = 22/7 x jari-jari kuadrat
jari-jari = 616 x 7/22
= 196
jari-jari = akar kuadrat 196 adlah 14
Jadi jari-jari lingkaran tersebut adalah 14 cm
616 = 22/7 × r²
r² = 616×7 : 22
r² = 196
r = √196
r = 14cm