The answer to your question is b -1
Answer:
the answer is 1. have a nice day!!!

so... that's how much an internal angle is
now, subtract that from 180 and you get the angle outside, in the picture
subtract that outside angle twice from 180, and you get angle "2"
because angle 2 is in the same triangle as those two outside angles, and all internal angles in a triangle is 180, thus 180 - (those two angles) is angle "2"
Answer:
784 sorry my math was wrong lol
explanation:
multiply the numbers of each triangle sepratley.
then subtract them to get 784
Answer is written down below