Achar a distância do ponto P ao plano π nos casos:
11. P(2, -1, 2)
π : 2x - 2y - z + 3 = 0
m → = (2, -2, -1)
12. P(3, -1, 4)
π : x + y + z = 0
d = |AP • m → | / |m → |
13. P(1, 3, -6)
π : 4x - y + z + 5 = 0
14. P(0, 0, 0)
π : 3x - 4y + 20 = 0
15. P(1, 1, 1)
π : x = 2 + 2h + 3t
y = -1 + b + t
