Answer:
a) 160°
b) 18 sides
Step-by-step explanation:
Interior angle = 180 - exterior
= 180 - 20 = 160°
Each angle of a regular polygon:
[(n-2)×180]/n = 160
180n - 360 = 160n
20n = 360
n = 18
Alternate approach for no. of sides:
360/n = each exterior angle
360/n = 20
n = 360/20 = 18
Answer:
Step-by-step explanation:

Step-by-step explanation:
- 1736-8166x71662=8177103 :D
8 x 1.25 = 10
10 x 10 = 100
0.09-0.089= 0.001 Therefore,0.09 is bigger than 0.089 by 0.001.