7) 55/282, sudah paling sederhana
8) K=3/4(2πr)=3/2 πr=3/2(22/7)(22)=1452/14=726/7=103 5/7cm
9) L= ½ a.t=½ 16.7=56cm²
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7) 55/282, sudah paling sederhana
8) K=3/4(2πr)=3/2 πr=3/2(22/7)(22)=1452/14=726/7=103 5/7cm
9) L= ½ a.t=½ 16.7=56cm²