anonymous
  • anonymous
the equation a= 180(n-2)/n represents the angle measures, a, in a regular n-sided polygon. When the equation is solved for n, n is equal to a fraction with a denominator of a – 180. What is the numerator of the fraction?
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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welshfella
  • welshfella
a = angle measures Do you mean the measure of one angle in the polygon or the total measure of all the angles?
anonymous
  • anonymous
the equation a= 180(n-2)/n represents the angle measures, a, in a regular n-sided polygon. When the equation is solved for n, n is equal to a fraction with a denominator of a – 180. What is the numerator of the fraction?
anonymous
  • anonymous
sorry i forgot to write the equation in

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welshfella
  • welshfella
an = 180n - 360 an - 180n = -360 can you continue?
anonymous
  • anonymous
ummm, maybe?
welshfella
  • welshfella
factor the LHS . Take out n.
anonymous
  • anonymous
What is LHS?
welshfella
  • welshfella
the left side of the equation
anonymous
  • anonymous
Okay, sorry i'm not the smartest... at all
welshfella
  • welshfella
n is common to both terms
anonymous
  • anonymous
alright, so do i divide n from both sides?
welshfella
  • welshfella
no factor an - 180n = n(a-180) = -360 now you divide both sides by a - 180
welshfella
  • welshfella
you have the numerator on RHS already
anonymous
  • anonymous
Alright..
welshfella
  • welshfella
|dw:1443469934695:dw|
welshfella
  • welshfella
the a - 180 on LHS cancel out:-
welshfella
  • welshfella
|dw:1443470052498:dw|

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