Jawabanmu

2014-03-05T05:00:48+07:00
2014-03-05T05:11:58+07:00
Segitiga         =0
segiempat     =(n-3) n/2 = (4-3) 4/2 = (1) 2 = 2
segi delapan  =(n-3) n/2 = (8-3) 8/2 = (5) 4 = 20 
1 5 1