SOLUTION: 18. It is possible for the interior angles of a regular polygon to measure 145�. true false 19. Calculate the measure for each exterior angle of a regular nonagon. 20�

Question 148652: 18. It is possible for the interior angles of a regular polygon to measure 145�.
true
false
19. Calculate the measure for each exterior angle of a regular nonagon.
20�
40�
140�
1260�
20. Calculate the measure for each interior angle of a regular 15-gon.
12�
24�
156�
2340�

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
18. It is possible for the interior angles of a regular polygon to measure 145�.
true
false
-------------
False - 145 has a factor of 29.
Interior angles for n-sides = ((n-2)*180)/n
It's not possible to have a factor of 29 for integer values of n.
-----------------
19. Calculate the measure for each exterior angle of a regular nonagon.
20�
40�
140�
1260�
---------
(9-2)*180/9 = 140
---------------
20. Calculate the measure for each interior angle of a regular 15-gon.
12�
24�
156�
2340�
-------
(15-2)*180/15 = 156

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