Jawabanmu

2014-01-29T10:01:29+07:00
Luas juring =  \frac{sudut pusat}{360} X  \pi X r^{2}
10 =  \frac{sudut pusat}{360} X 3.14 X 4^{2}
10 = [tex] \frac{sudut pusat}{360} X 50.24
10 X 360 = sudut pusat X 50.24
3600 = sudut pusat X 50.24
sudut pusat = 3600 : 50.24
sudut pusat = 71.65

Panjang busur = [tex] \frac{sudut pusat}{360} X 2 X \pi X r
Panjang busur = [tex] \frac{71.65}{360} X 2 X 3.14 X 4
Panjang busur = 5 cm
3 4 3