A = Point(xAxis)
C = Intersect(xAxis, zAxis)
B: (0, 4, 0)
D: (x(A), y(B), 0)
E: (0.5, 2, 4)
a, FlächeACBD, FlächeACE, FlächeADE, FlächeBDE, FlächeBCE, KanteAC, KanteAD, KanteBD, KanteBC, KanteCE, KanteAE, KanteDE, KanteBE = Pyramid(C, A, D, B, E)
b: 8 / ((sqrt(21) * sqrt(13)))
E': (x(E), y(E))
f = Segment(E', D)
g = OrthogonalLine(E', f, xOyPlane)
c = Circle(E', z(E))
F, E'' = Intersect(g, c)
h = Segment(E'', D)
β = Angle(E'', D, E', xOyPlane)
i = Segment(D, C)
δ = Angle(E, D, C)
j = Segment(E'', E')
k = Segment(E, E')
α = Angle(E, D, E')
H = Point(c)
I = Point(c)
d = CircleArc(E', H, I)
d1, e'', e', d_1 = Polygon(E', D, E'')
γ = Angle(D, E', E'', xOyPlane)
G = (-2.6640176537914937, -2.0148354987611214)
J = (-1.2026246192159182, -2.0148354987611214)