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Answered by
1
Answer:
Step-by-step explanation:
Answer:
160
°
Explanation:
An alternative method is to use the exterior angle.
the sum of the exterior angles is ALWAYS
360 °
So you can find the size of the exterior angles of a regular polygon quite easily:
If there are 18 sides
(n=18)
, then each exterior angle is:
360/n= 360/ 18 is 20
The sum of the exterior and interior angles is
180 °
because they are adjacent angles on a straight line.
∴
each interior angle is
180-20 is 160.
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