Question

Did I do the first one right ?
And help
On the second one

Answer 1

A)your answer is correct but you can also use the formular
Sum of interior angles=(2times number of sides -4)90
2times11 -4=18
18 times 90
=1620

B)if 11 sides=1620
1 side=?
1620/11
=147.27 degrees