3.2 Lines On a Plane

Condition: according to the coordinates of the vertices of the triangle \ (a b c \) find: 1) the perimeter of the triangle, 2) the equations of the parties \ (a b \) and \ (b c \). \ [A = (3; -3), \ quad b = (7; -3), \ quad C = (5; 5) \ Text {. } \]