Answer:
847.9
Step-by-step explanation:
I) 156 degrees
The exterior angle is 180-156
=24
The number of sides=

The number of sides= 15 sides
ii) 162 degrees
The exterior angle= 180-162
=18
The number of sides=

= 20 sides
The greatest common factor for 162, 378, and 414 is 18. k