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misal x/360 = y
AB = y x 2 x 22/7 x r
26,4 = 44/7 r y
r y = 4,2
OAB = y x 22/7 x r²
184,8 = 22/7 r² y
r² y = 58,8
r (ry) = 58,8
r (4,2) = 58,8
r = 14 cm
Keliling = 2 x 22/7 x 14 = 88 cm