Question 148652
18. It is possible for the interior angles of a regular polygon to measure 145°. 
true 
false
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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.
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19. Calculate the measure for each exterior angle of a regular nonagon. 
20° 
40° 
140° 
1260° 
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(9-2)*180/9 = 140
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20. Calculate the measure for each interior angle of a regular 15-gon. 
12° 
24° 
156° 
2340° 
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(15-2)*180/15 = 156