Actually yea every closed shape a polygon.
12/8 is the correct answer
hope this helps :)
False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false False the answer is false
Answer:
m angle B=141
Step-by-step explanation:
a 7 sided shape has 900 total degrees
subtract all the known angkes to find your answer
900-90-148-142-130-129-120=141
hope this helps :)
-18a+17b is the answer because you multiply by -1 to each