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Which of the following can be a perimeter of a triangle inscribed in a circle of radius 1?

I. 0.001

II. 0.010

III. 0.100

# I only # III only # II and III only # I, II, and III # not I, II, or III

IMO there is no restriction in the size(perimeter) of a triangle inscribed in a circle since there are many sets of triplets of coordinates in triangle.Hence D is IMO Answer
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You post so many good questions in quant.whats the source of these questions?is there any Q bank ? or Book?

I am working through the GMAT Club tests right now Priya. Most of the questions I post are questions I find interesting/challenging/conceptual. I think gmatclub has a summer pack for $29.

Re: Which of the following can be a perimeter of a triangle [#permalink]

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03 Feb 2013, 13:00

I have a very specifc doubt

Since we know that perimeter of equilateral triangle is the smallest. Hence, Formula for circul radius is s/Square root (3) Than the side of the equilateral triangle is Sqr root(3) Therefore minimum perimeter that a triangle can have is 3*Sqr root of 3

Re: Which of the following can be a perimeter of a triangle [#permalink]

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30 Apr 2013, 06:05

Hi While solving question I was stuck that we need to take care of the property that sum of two sides must be greater than the third side. Isn't it required? Please clarify.

Hi While solving question I was stuck that we need to take care of the property that sum of two sides must be greater than the third side. Isn't it required? Please clarify.

Regards, H

Yes, the length of any side of a triangle must be larger than the positive difference of the other two sides, but smaller than the sum of the other two sides.

But how do you use the above property to solve the question?

The lower limit of the perimeter of an inscribed triangle in a circle of ANY radius is 0: P>0.

Re: Which of the following can be a perimeter of a triangle [#permalink]

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30 Apr 2013, 07:28

Bunuel wrote:

Yes, the length of any side of a triangle must be larger than the positive difference of the other two sides, but smaller than the sum of the other two sides.

But how do you use the above property to solve the question?

The lower limit of the perimeter of an inscribed triangle in a circle of ANY radius is 0: P>0.

Answer is D.

Thanks Bunuel, It makes sense. Just wondering, , had the question been Must be True, then I believe, Answer would have been None of These. Am I correct? Please clarify.

Yes, the length of any side of a triangle must be larger than the positive difference of the other two sides, but smaller than the sum of the other two sides.

But how do you use the above property to solve the question?

The lower limit of the perimeter of an inscribed triangle in a circle of ANY radius is 0: P>0.

Answer is D.

Thanks Bunuel, It makes sense. Just wondering, , had the question been Must be True, then I believe, Answer would have been None of These. Am I correct? Please clarify.

Regards, H

Sure. We don't know what is the actual perimeter of the triangle.
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Re: Which of the following can be a perimeter of a triangle [#permalink]

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22 Jun 2014, 23:49

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with the given info we can have an upper limit to the perimeter but cannot say the lower limit, it can be easily any minute value. Here we are given radius as 1.. the max perimeter should be of a triangle which has two sides almost of the length of dia and third a very very minute value, so it will be nearly 4.. so you can easily say any value<4 is a possiblity..

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