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OpenStudy (anonymous):
The sum of the measures of the interior angles of a regular polygon is 1980. Find the number of sides in the polygon.
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OpenStudy (anonymous):
What do the inside angles of a triangle measure?
OpenStudy (anonymous):
180?
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
12 sides
OpenStudy (anonymous):
it said that was wrong on the practise quiz
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OpenStudy (anonymous):
Sorry I was wrong. It is 13. You subtract the number of sides and then multiply by 180. So if you want 1980 then: (x-2)*180 = 1980 which is 13
OpenStudy (anonymous):
thank you
OpenStudy (anonymous):
np
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