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Which of the following can be a perimeter of a triangle [#permalink]
 02 Aug 2008, 20:27
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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 A. I only B. III only C. II and III only D. I, II, and III E. Not I, II, or III
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aaron22197 wrote: 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 i think its D. we can have very small triangle possbile in one small chord of the circle ...
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aaron22197 wrote: 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?
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spriya wrote: 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.
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Director
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E
by definition, an inscribed triangle must have all 3 vertexes as points on the perimeter of the circle.
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Director
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gmatnub wrote: E
by definition, an inscribed triangle must have all 3 vertexes as points on the perimeter of the circle. even with all 3 points on the perimeter of the circle, we can have a very small triangle possible ....
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Director
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durgesh79 wrote: gmatnub wrote: E
by definition, an inscribed triangle must have all 3 vertexes as points on the perimeter of the circle. even with all 3 points on the perimeter of the circle, we can have a very small triangle possible .... the question stated that the radius of the circle is 1
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Director
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gmatnub wrote: durgesh79 wrote: gmatnub wrote: E
by definition, an inscribed triangle must have all 3 vertexes as points on the perimeter of the circle. even with all 3 points on the perimeter of the circle, we can have a very small triangle possible .... the question stated that the radius of the circle is 1 doesnt matter.. please see attached pic.. can make that traingle even smaller as compared to circle Attachment: 
circle.PNG [ 11.33 KiB | Viewed 1203 times ]
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Director
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thanks, did not see that coming.
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Re: Which of the following can be a perimeter of a triangle [#permalink]
03 Feb 2013, 14:00
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
Hence the answer should be E.
i know i am missing sthn
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Re: Which of the following can be a perimeter of a triangle [#permalink]
30 Apr 2013, 07:05
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. Regards, H
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Re: Which of the following can be a perimeter of a triangle [#permalink]
30 Apr 2013, 08:00
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Re: Which of the following can be a perimeter of a triangle [#permalink]
30 Apr 2013, 08:28
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. Regards, H
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Re: Which of the following can be a perimeter of a triangle [#permalink]
30 Apr 2013, 08:30
imhimanshu wrote: 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. 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]
30 Apr 2013, 08:30
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