Respostas

2014-02-13T14:44:53-02:00
D²AB=(xa-xb)²+ya-yb)²
d²ab=(1+2)²+(5-1)²
d²ab=9+16
d²ab=25
dAB=5

d²BC=-2+4)²+(1-1)²
D²BC=4+0
DBC=2

D AC=1-4)²+(5-1)²
D²AC=9+16
DAC=5