Respuesta :
Answer:
Option D.) [tex]100 \textdegree[/tex] is correct.
Step-by-step explanation:
In a quadrilateral, ABCD, opposite angles are supplementary.
[tex]\angle BCD + \angle BAD = 180\textdegree[/tex]
therefore [tex]\angle BCD = 180\textdegree - \angle BAD = 180\textdegree - 80\textdegree = 100 \textdegree[/tex]
therefore option D.) [tex]100 \textdegree[/tex] is correct.
