3420°
explanation:
the equation of the sum of interior angles are (n-2)x180
polygon above has 21 sides so you sub n as 21 and plug the equation in the calculator
nsweres el dodeel s Step-by-step explanationen
The answer to your question is 1 7/12
This answer would be D) + 6.
Hope this helps if so please mark me as brainlest thank you !!
