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# Are two triangles congruent? (1) Both triangles are right

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VP
Joined: 25 Nov 2004
Posts: 1428
Are two triangles congruent? (1) Both triangles are right  [#permalink]

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15 Feb 2005, 23:04
00:00

Difficulty:

(N/A)

Question Stats:

86% (00:04) correct 14% (00:50) wrong based on 27 sessions

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Are two triangles congruent?

(1) Both triangles are right triangles.
(2) Both triangles have the same perimeter.

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VP
Joined: 13 Jun 2004
Posts: 1076
Location: London, UK
Schools: Tuck'08

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16 Feb 2005, 01:32
1
for information : "congruent" -> Figures or angles that have the same size and shape.

E for me.
Manager
Joined: 08 Oct 2004
Posts: 223

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16 Feb 2005, 01:43
Congruency in triangles is best described by the

AAS, SAS, SSS, AAA concepts. Where A=Angle, S=Side .
When 2 triangles have one of these similar then they are called congruent.

E it is
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VP
Joined: 13 Jun 2004
Posts: 1076
Location: London, UK
Schools: Tuck'08

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16 Feb 2005, 01:47
bozo190101 wrote:
Congruency in triangles is best described by the

AAS, SAS, SSS, AAA concepts. Where A=Angle, S=Side .
When 2 triangles have one of these similar then they are called congruent.

E it is

first time i heard about this concept, can you detail it a little more ? it seems fast.
Manager
Joined: 08 Oct 2004
Posts: 223

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16 Feb 2005, 02:06
http://geosite2003.tripod.com/congruency_similarity.htm

This site might help clarify the theorems.

Easiest method is just checking for the three conditions to see if there is a congruency.
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Believe in yourself.

Manager
Joined: 13 Feb 2005
Posts: 59
Location: Lahore, Pakistan

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16 Feb 2005, 02:20
Antmavel wrote:
bozo190101 wrote:
Congruency in triangles is best described by the

AAS, SAS, SSS, AAA concepts. Where A=Angle, S=Side .
When 2 triangles have one of these similar then they are called congruent.

E it is

first time i heard about this concept, can you detail it a little more ? it seems fast.

it amazes me that a guy like u doesnt know abt these things....anyways...the answer is E
VP
Joined: 13 Jun 2004
Posts: 1076
Location: London, UK
Schools: Tuck'08

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16 Feb 2005, 07:30
faizaniftikhar83 wrote:
Antmavel wrote:
bozo190101 wrote:
Congruency in triangles is best described by the

AAS, SAS, SSS, AAA concepts. Where A=Angle, S=Side .
When 2 triangles have one of these similar then they are called congruent.

E it is

first time i heard about this concept, can you detail it a little more ? it seems fast.

it amazes me that a guy like u doesnt know abt these things....anyways...the answer is E

In fact i am not so good in quants, I miss some basic knowledge...and to be honest this problem taught me the meaning of "congruent" I didn't know this word before...i am a poor french lost in the quant world
VP
Joined: 25 Nov 2004
Posts: 1428

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28 Feb 2005, 23:29
ok, Guys, OA is E because both statements are insufficient to answer.........
Manager
Joined: 27 Jan 2005
Posts: 97
Location: San Jose,USA- India

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01 Mar 2005, 10:39
Some background.Correct me if I am wrong here.

Congruent triangles and similar triangles are differrent.

Cogruent triangles have everything same all sides and all angles between two triangles.meaning a1=a2,b1=b2,c1=c2 and angles A1=A2,B1=B2,C1=C2. However you donot need to wait to verify all sides and angles are equal.For example in ASA triangles, two angles and a side in between these angles are same in the two triangles.This information is good enough to conclude that these two triangles are congruent and have all sides and angels are equla between the two triangles.

In similar triangles, angles are same but sides are not same but they will be in the same ratio. Meaning a1/b1=a2/b2=a3/b3.
Manager
Joined: 15 Feb 2005
Posts: 237
Location: Rockville

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01 Mar 2005, 16:40
E for me too
Nice explanation...we should make this a sticky
VP
Joined: 25 Nov 2004
Posts: 1428

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01 Mar 2005, 22:16
700Plus wrote:
Some background.Correct me if I am wrong here.

Congruent triangles and similar triangles are differrent.

Cogruent triangles have everything same all sides and all angles between two triangles.meaning a1=a2,b1=b2,c1=c2 and angles A1=A2,B1=B2,C1=C2. However you donot need to wait to verify all sides and angles are equal.For example in ASA triangles, two angles and a side in between these angles are same in the two triangles.This information is good enough to conclude that these two triangles are congruent and have all sides and angels are equla between the two triangles.

In similar triangles, angles are same but sides are not same but they will be in the same ratio. Meaning a1/b1=a2/b2=a3/b3.

nice explanation. in short:
Congruent triangles= all corresponding sides and angles are equal
similar triangles= all corresponding angles, not sides, must be equal.

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

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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!

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Non-Human User
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Posts: 9128
Re: Are two triangles congruent? (1) Both triangles are right  [#permalink]

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08 Aug 2018, 20:34
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Re: Are two triangles congruent? (1) Both triangles are right &nbs [#permalink] 08 Aug 2018, 20:34
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