∠ABC = 180°; ∠ABE = 154°; ∠DBC = 128°; ∠DBE - ?
∠CBE = ∠ABC - ∠ABE = 180° - 154° = 26°
∠DBE = ∠DBC - ∠CBE = 128° - 26° = 102°
∠DBE = 102°
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∠ABC = 180°; ∠ABE = 154°; ∠DBC = 128°; ∠DBE - ?
∠CBE = ∠ABC - ∠ABE = 180° - 154° = 26°
∠DBE = ∠DBC - ∠CBE = 128° - 26° = 102°
∠DBE = 102°