Matematika

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Tolong no 21 sama caranya
Tolong no 21 sama caranya

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  • ∠BFE = 75°
    ∠BED = 130°
    ∠FEB = 180° - 130°
              = 50°
    ∠FEB + ∠BFE + ∠FBE = 180°
    50° + 75° + ∠FBE = 180°
    ∠FBE = 180° - 125°
               = 55°

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