You Forgot The Radius Again!

Geometry Level 2

A regular hexagon is inscribed in a circle. Which of these shapes has a larger perimeter? The hexagon, or the circle?

The circle The hexagon They have the same perimeter

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2 solutions

Abc Xyz
Apr 12, 2016

Hey guys can we look at it like this :

Clearly since it is a regular hexagon the sides are also equal to r.

Where r is the radius of the circle.

Now perimeter of regular hexagon is 6 r 6 * r = 6r

and perimeter of circle is 2 p i r 2 * pi * r

Considering pi = 3.14 we get 6.28 r 6.28r > 6 r 6r

So clearly circle's perimeter is greater.

Correct! +1

Pi Han Goh - 5 years, 2 months ago

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Thanks !!!

abc xyz - 5 years, 2 months ago

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Pi Han Goh - 5 years, 2 months ago

Nice solution!!! But more than that “nice name" a b c abc x y z xyz +1

Atul Shivam - 5 years, 2 months ago
Jai Jain
Apr 8, 2016

Not exactly mathematical but, the curved line is going to be longer.

Moderator note:

Yes, that's essentially the argument.

Why is it true? Why is this property known as?

Why is it true? Why is this property known as?

Calvin Lin Staff - 5 years, 2 months ago

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