There are 13 rows because 65 divided by 5 is equal to 13.
Sum of all the interior angles = (5-2)x180 = 540°
540 - 100 - 120 - 100 - 90 = 130°
So the last unknown angle in the polygon is 130°
Sum of all the adjacent angles on a straight line is 180°
Angle 1 = 180 - 130 = 50°
I think it would be 315. because 4.5*70..but im not sure
The answer is 4 because the bottom and line DE form a right angle
