Question

how many side does a regular polygon have,if each of its interior angle is 165?

Answer 1

let the no of side be x
165x=180(x-2)
165x=180x-360
165x-180x=-360
-15x=-360
x=-360÷-15
x=24

Answer 2

let no of sides be x ,
165x=180(x-2)
165x=180x-360
165x-180x=-360
-15x=-360
+15x=+360
x=360/15
x=72