Jawabanmu

2014-02-10T21:15:01+07:00
Panjang tali = keliling lingkaran + 4 x r
144 = 2  \pi r+ 4 x r
144 = 2 x 22/7 x r + 4r
144 = 44r/7 + 4r
144 = (44r+28r)/7
144 = 72r/7
r = 7 x 144/72
r = 14 cm
4 3 4