Calcular a área do triangulo de vértices:b) A (1, 0, 1) B (4, 2, 1) C ( 1, 2, 0)c) A (2, 3, -1) B (3, 1, -2) C ( -1, 0, 2)d) A (-1, 2, -2) B (2, 3, -1) C (0, 1, 1)