The reflection of the point (α, β, γ) in the xy– plane is



The equation of XY plane is given by Z = 0


Given point (α,β,γ).


If we draw perpendicular from the point in the XY plane,


The coordinates of the point will be (α,β,0)


Let its reflection be (x,y,z)


So,



x = α



y = β



z = -γ


The reflection is:


(α , β ,-γ )

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