Ask
your own question, for FREE!
Mathematics
17 Online
The exterior angle measure of a regular polygon is 20 degrees. How many sides does the polygon have? 9 16 18 20
Still Need Help?
Join the QuestionCove community and study together with friends!
Interior angle would be 180 - 20 = 160 Now that we know this, let's use the formula. \(\Large \color{MidnightBlue}{\Rightarrow {180n - 360 \over n} = 160 }\) \(\Large \color{MidnightBlue}{\Rightarrow 160n = 180n - 360 }\) \(\Large \color{MidnightBlue}{\Rightarrow 0 = 20n - 360 }\) \(\Large \color{MidnightBlue}{\Rightarrow -20n = -360 }\) \(\Large \color{MidnightBlue}{\Rightarrow 20n = 360 }\) \(\Large \color{MidnightBlue}{\Rightarrow n = 18 }\) 18 sides.
OH the same formula huh ok
Yep :P
(2n-4)*9=16n => 18n-36=16n => 2n=36=> n=18
Can't find your answer?
Make a FREE account and ask your own questions, OR help others and earn volunteer hours!
Join our real-time social learning platform and learn together with your friends!
Join our real-time social learning platform and learn together with your friends!
Latest Questions
Countless7Echos:
Ah trying out the whole T.V girl drawing :p (I love drawing eyes)
SnowyBreaks:
You ever get the types of dreams where it feels as if you aren't breathing? And w
laylasnii13:
Poem/diary i wrote I Want Out Iu2019m so tired of screaming into walls. Every fight with my mom leaves something broken and itu2019s not just plates or slam
Countless7Echos:
Aye.. I need actually some help on the shading here.. if the light is from above too I just feel something is off.
20 minutes ago
1 Reply
1 Medal
8 hours ago
6 Replies
0 Medals
1 day ago
13 Replies
3 Medals
2 days ago
19 Replies
3 Medals