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Answer:
26 = <F
Step-by-step explanation:
Since the triangle is isosceles, the base angles are the same
<D = <F
26 = <F
The triangle is a isosceles triangle
[tex]\\ \rm\Rrightarrow <D=<F[/tex]
[tex]\\ \rm\Rrightarrow <F=26°[/tex]