A(2,0,0) B(2,0,0) C(-2,0,0) D(0,0,2)
A(0,0,2) B(-2,0,0) C(2,0,0) D(-2,0,0)
A(0,0,2) B(-2,0,0) C(2,0,0) D(0,-2,0)
x=0
y=0
z=0
qual dos pontos pertence ao 1º octante?
A(1,2,3)
A(-1,2,3)
A(1,2,-3)