Answer:
the building is aged and unique.
Dieikenfjdj dodkfkdkd dkdkfkdndd disk djdkd
A parallelogram
Because...
-opposite angles are congruent
-four sides
-angles must equal 360
100 + 100 +80 + y = 360
280 + y = 360
y = 80
-the angle we don't know is 80 degrees
