Question:
Tick (✓) the correct answer:
The measure of each exterior angle of a regular polygon is 40°. How many sides does it have?
(a) 8
(b) 9
(c) 6
(d) 10
Solution:
(b) 9
Each exterior angle of a regular $\mathrm{n}-$ sided polygon $=\frac{360}{n}=40$
$\Rightarrow n=\frac{360}{40}=9$