It should be C can u help me with one i posted????
Answer: 4
Step-by-step explanation: if 2 times y(2) is 4 what plus 4 equals 12...8 right? but you have to take 2 and multiply it by 4 in order to get 8. So the answer is 4. Hope this helps! :)
Sum of all interior angles on a polygon is
180( n - 2) n = number of sides in the polygon.
now, this one is is a 21-gon, thus the sum is 180( 21 - 2).
9x8y12 it a lot of work to do so I don't want to type how to do the problem