Jawabanmu

2014-02-09T14:40:43+07:00
Klau gk salah
4/5*180 = 144
jd pnjang busur = 144/360 * 132
                       = 52,8 cm
2014-02-09T14:45:17+07:00
Keliling lingkaran=360°=2π=132cm | Sudut AOB=4/5π=0,8π | AB= 132cm*0,8π/2π=52,8cm