Answer and explanation.

Answer:
you have to change the 145* to 110* and flip it to the idol point in x
Step-by-step explanation:
hope this helps, I was just doing this
Answer:
The polygon is a pentagon and it has 5 sides so use the formula to find the sum of the interior angles that is (n-2)×180°.so,
(5-2)×180 = 540°
540-145-110-105-100 = 80°
so the answer is 80°