Hallo Anjura,
nein:
Fläche PG = | \(\overrightarrow{AB}\) x \(\overrightarrow{AC}\) |
= | ([3, 0, 4] - [4, 6, 0]) ⨯ ([3, 0, 4] - [0, 7, 1]) | = | [-1, -6, 4] x [3, -7, 3] |
= | [10, 15, 25] | = √( 102 + 152 + 252 ) = √950 = 5·√38 ≈ 30,82 (Flächeneinheiten)
Gruß Wolfgang