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Triangles

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Intern
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Triangles  [#permalink]

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New post 19 Jul 2017, 13:50
Image

Okay.

I feel the answer should be II only.

But according to the kaplan book it is I and II only.

Why should I option: x>50 be true? (x=65) and any number between 50 and 65 would make the figure not a triangle.

Can someone please explain this to me please?

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Re: Triangles  [#permalink]

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New post 19 Jul 2017, 14:28
The option, i, is based on the given facts of the triangle. Not the other way around! So based on the facts given about the triangle, we know there is only 1 value for x, and that is 65. Therefore, option i must be true, since 65>50.

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Re: Triangles  [#permalink]

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New post 19 Jul 2017, 14:34
clee1827 wrote:
The option, i, is based on the given facts of the triangle. Not the other way around! So based on the facts given about the triangle, we know there is only 1 value for x, and that is 65. Therefore, option i must be true, since 65>50.

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Another way to think about it is that option ii doesn't explicitly state a certain length, but we know that, based on the diagram of the triangle and it's angles, the length must be greater than 10. In the same way, we know that, based on the diagram, the angle x must be greater than 50 degrees.

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Re: Triangles  [#permalink]

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New post 19 Jul 2017, 18:39
2
From the given info x+x+x-15 = 180 => x = 65, and we know AB =10.
So I is true, solving for AC will tell us AC < 10 => II is true. But III is false
Hence overall the ans is Option 3 (I and II only)
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Re: Triangles  [#permalink]

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New post 20 Jul 2017, 05:39
akashjan10 wrote:
Image

Okay.

I feel the answer should be II only.

But according to the kaplan book it is I and II only.

Why should I option: x>50 be true? (x=65) and any number between 50 and 65 would make the figure not a triangle.

Can someone please explain this to me please?


Please read carefully and follow our RULES OF POSTING. Thank you.

--== Message from the GMAT Club Team ==--

THERE IS LIKELY A BETTER DISCUSSION OF THIS EXACT QUESTION.
This discussion does not meet community quality standards. It has been retired.


If you would like to discuss this question please re-post it in the respective forum. Thank you!

To review the GMAT Club's Forums Posting Guidelines, please follow these links: Quantitative | Verbal Please note - we may remove posts that do not follow our posting guidelines. Thank you.

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Re: Triangles   [#permalink] 20 Jul 2017, 05:39
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