Jawabanmu

2014-02-12T20:12:37+07:00
Misalkan sudut pusat α
luas juring = α/360° × πr²
308 = α/360° × 22/7 × 14 × 14
308 = α/360° × 616
α = 308 × 360 ÷ 616
α = 180°