Question

find and solve it plz​

Answer 1

Just keep in mind, the following properties in this regard

1) the sum of exterior angles of a polygon (whether regular or not) is independent of number of sides of the polygon and is always equal to 360°

2) sum of interior angles of a polygon is (n - 2)x180°

3) Each interior angles of a REGULAR polygon is equal to (n - 2)*180°/n

a) x + 85 + 20 + 92 + 89 = 360

x + 286 = 360

x = 360 - 286

x = 74°

b) ASP of octagon = (8 - 2)*180

= 6*180

= 1080°

c) each angle of a regular octagon

= 1080/8

= 135°