Răspuns:
Salut
Ex,2:
m=6+x/2=-5; 6+x=-10; x=-10-6=-16.
m=-4+y/2=3; -4+y=6; y=6+4=10.
B(x,y)=B(-16;10)
Ex,3:
AB=√2²+(-2)²
AB=√4+4
AB=√8
AB=2√2
AC=√0²+(-4)²
AC=√16
AC=4
BC=√2²+(-2)²
BC=√4+4
BC=√8
BC=2√2
P∆ABC=AB+BC+AC=2√2+2√2+4=4√2+4
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