Answer:
0
Step-by-step explanation:
just did it. hope it helps
Answer:
the answer is 7/√2
Step-by-step explanation:
See the picture please
It is 90 degrees. you simply divide 360 by number of sides
When you put your 2 rounded ends together you get a perfect circle so let's find the circumference around that circle first.

which of course gives us a circumference of

. Now add in 300 + 300 to get 600+140pi, and when you multiply 400 times pi and add in the 600 you get 1039.8, which is your 1040 above.