$\vec{%n}$

$\vec{%n}$

$ \vec{b} $

$ \vec{c} $

$ \vec{a} $

O = (-3.5583403824508624, -2.4180946149889344, 0.27386593452577923)
B = (2.1261079650839325, -0.8454039811142336, 0.3412812276986603)
b = Vector(O, B)
A = (-2.9161417710836908, 3.2833485234848325, 0.3933498088777848)
a = Vector(O, A)
C = (-1.2622086494160434, -0.12213164002019489, 5.1319825137340755)
c = Vector(O, C)
D2 = Midpoint(A, O)
E2 = Midpoint(O, C)
F2 = Midpoint(O, B)
D = (-2.8335164460175744, 3.7749306260599704, 0)