Question

Find the value of n. how do you find it?

Answer 1

The sum of all the internal angles of a simple polygon is 180(n-2)° where n is the number of sides.

Sum of all the internal angles of a simple polygon is 180(6-2)° =720°

(n+6)+n+140+151+62+135 =720°

2n+494=720°

2n =226

n =113°