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# Is MNP isosceles? (1) Exactly two of the angles, Angle M and

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Is MNP isosceles? (1) Exactly two of the angles, Angle M and [#permalink]

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05 Aug 2008, 19:34
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Is ΔMNP isosceles?

(1) Exactly two of the angles, Angle M and Angle N, have the same measure
(2) Angle N and Angle P do not have the same measure.

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Senior Manager
Joined: 23 May 2006
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05 Aug 2008, 19:54
S1. tells you that two angles are equal and hence the two corresponding sides are also equal hence isosceles
S2. The third angle could be anything 180 -x - y.

IMO A

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Director
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06 Aug 2008, 01:49
should be A

interesting discussion on defition of isoceles triangle .. 7-t68126

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VP
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06 Aug 2008, 18:19
x2suresh wrote:
xang wrote:
Is ΔMNP isosceles?

(1) Exactly two of the angles, Angle M and Angle N, have the same measure
(2) Angle N and Angle P do not have the same measure.

A.

(1) says both angles are equal hence isosceles INSUFFI
(2) N and P not equal what if M,N or M,P are equal hence isosceles INSUFFI

hence IMO A
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Intern
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07 Aug 2008, 05:02
durgesh79 wrote:
should be A

interesting discussion on defition of isoceles triangle .. http://gmatclub.com/forum/7-t68126

OA is A.

My doubt was wheter a Equilateral triangule were Isosceles.

Thanks durgesh79 for the discussion post! It was very helpful!

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07 Aug 2008, 06:10
xang wrote:
durgesh79 wrote:
should be A

interesting discussion on defition of isoceles triangle .. 7-t68126

OA is A.

My doubt was wheter a Equilateral triangule were Isosceles.

Thanks durgesh79 for the discussion post! It was very helpful!

obvisously equilatral triangle is an isosceles triangle.

In this question.

Statement 1 --> tells that there is triangle with exactly two angles are equal. can this answer the question.
Yes, this must be isosceles triangle.. it answered the quesiton. so Option A is correct.
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Re: DS - Isosceles   [#permalink] 07 Aug 2008, 06:10
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