COMMUNICATION
1. yes theres a problem, because the sum of all angles must be 540° for pentagon.
2a. x and y is 145°
THINKING
1a. (n-2) x 180
( 10-2) x 180
answer : 1440
b. (n-2) x 180 / n
(10-2) x 180 / 10
answer: 144
* for question 2b im not sure but I inserted the picture for some reference :)
hope this helps