SOLUTION: The vertices of a regular pentagon lie on the circumference of a circle radius 10cm.
Calculate:
a) the lengths of the sides of the pentagon
b) the difference in area between the
Algebra.Com
Question 988376: The vertices of a regular pentagon lie on the circumference of a circle radius 10cm.
Calculate:
a) the lengths of the sides of the pentagon
b) the difference in area between the circle and the pentagon
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!
From the Law of Cosines the measure of a side 
of a regular 
-gon inscribed in a circle of radius 
is:
})
or
})
If you prefer to work with radians instead of degrees.
John
My calculator said it, I believe it, that settles it
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