a = [1 -2 0];
b = [0 1 1];
c = [1 2 2];
d = [a;
    b;
    c];
determinant = det(d)
figure
grid on
quiver3(0, 0,0, 1, 0,0, 1,'black','lineWidth',4)
hold on
axis equal
quiver3(0, 0,0, 0, 1,0, 1,'black','lineWidth',4)
quiver3(0, 0, 0, 0, 0, 1,1,'black','lineWidth',4)
quiver3(0, 0,0, 1, -2,0, 1)
quiver3(0, 0,0, 0, 1,1, 1)
quiver3(0, 0,0, 1, 2,2, 1)
ort_a = a ./ norm(a);
ort_b = b ./ norm(b);
ort_c = c ./ norm(c);
quiver3(0, 0,0, ort_a(1), ort_a(2), ort_a(3), 1,'black','lineWidth',4)
quiver3(0, 0,0, ort_b(1), ort_b(2), ort_b(3), 1,'black','lineWidth',4)
quiver3(0, 0,0, ort_c(1), ort_c(2), ort_c(3), 1,'black','lineWidth',4)