# Cool Geometry

**Geometry**Level 4

**ABCDEFGHIJKL** be a regular do-decagon, then the value of \(\frac { AB }{ AF } +\frac { AF }{ AB }\) is ?

**ABCDEFGHIJKL** be a regular do-decagon, then the value of \(\frac { AB }{ AF } +\frac { AF }{ AB }\) is ?

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