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Hi there!

I have got an problem here.It's a simple one.Not much to think about

"The ratio between the numbers of sides of two regular polygons is 1:2 and the ratio between the sum of their 3:4.Find the number of sides in each polygon"

It appears easy and is too. but the problem is the answer i am getting is absolutely wierd ie.,

-1 and -2 sides .:uhh:

In the work out I had considered the no . of sides to be x and 2x

the sum of interior angles 3y and 4y respectively.

so it ends up as {(4x-4)*90} -{(2x-4)*90} =4y-3y

=>180x=y

so i sustituted it in the equation (2x-4)*90=3y which ends up as -4=4x .: x= -1:uhh::

Book's answers are polygon with 5 and 10 sides .

I don't know whether I have gone wrong some where. If so Please help me correct it!(If the book's answer is wrong mention that too !)

Thank you

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# Homework Help: Polygon problem (? )

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