Respostas

2014-06-10T10:13:46-03:00
D= DIAGONAL
N = LADO
D=N(N-3)/2
65=N(N-3)/2
130= N²-3N
N²-3N-130=0
3+/-√9+520  /2
3+/-23  /2
3+23 /2= 13
3-23  /2= -10(NAO ATENDE)
R= 13
6 3 6