Jawabanmu

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2014-04-13T22:07:53+07:00
L juring =  \frac{30}{360} ×  \frac{22}{7} × 7 × 7
L juring =  \frac{1}{12} × 154
L juring = 12,84

P busur =  \frac{60}{360}  × \frac{22}{7}  × 42
P busur =  \frac{1}{6} × 22 × 6
P busur = 22

2014-04-13T22:10:00+07:00
1. 154×30/360=12.833 2. (22/7)(42)(60/360)=22 cek ulang yaa