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Sagot :

Since DG = EG, this is an isosceles triangle [2 sides of equal length].

Also,

GF bisects the side GE.

That means

EF is half of DE.

Given,

DE = 20.8

EF would be half of 20.8, so

[tex]\begin{gathered} EF=\frac{20.8}{2}=10.4 \\ EF=10.4 \end{gathered}[/tex]

Thus,

EF = 10.4

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