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= 7 × 7 × 22/7
= 154 cm
luas juring =
72/360 × 154
1/5 × 154 = 30,8 cm²
terima kasih ^_^ maaf klu salah
L.juring = 1/5 x 22/7 x 49
L.juring = 1/5 x 154
L.juring = 30,8 cm^2