Автор - lixtanska2005
N(-4;2), P(-2;-2), К(3;1), М(0;-6).
РN(-4+2; 2+2)=(-2; 4),
KN(-4-3; 2-1)=(-7; 1),
PM(0+2; - 6+2)=(2; - 4).
Протилежнi вектори PN i PM.
Р=|NP|+|PK|+|NK|,
|NP|=|/(4+16)=|/20=2|/5,
|NK|=|/(49+1)=|/50=5|/2,
PK(5;3),
|PK|=|/(25+9)=|/34,
P=2|/5+5|/2+|/34