Answer:
18
Step-by-step explanation:
I'm not sure but there is a rule that the sum of out side angles of each shape is 360
saying that 360/5= 72
so if we continue the lines it will be 36 degree to of the outside angles and 18 degree each
Not let's make that into another rectangle (The one that is upside down)
180- (2*18)= 144
So the big degree is 144
now again
(180-144)/2=18
So each of those small red angles are 18
