public function testCrossProductVolumeProperty(array $A, array $B, array $C)
{
$A = new Vector($A);
$B = new Vector($B);
$C = new Vector($C);
$A⋅⟮BxC⟯ = $A->dotProduct($B->crossProduct($C));
$⟮AxB⟯⋅C = $A->crossProduct($B)->dotProduct($C);
$this->assertEquals($A⋅⟮BxC⟯, $⟮AxB⟯⋅C);
}