Question 1020830
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I need help with knowing when to use ASA,AAS, and SAS.Can you please help. I asked my teacher and still don't get it. 
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You need first to know what are SAS, ASA and SSS.
They are three basic and independent tests for triangle congruency.


(by the way, AAS is the derivative of the ASA-test.)


Read these lessons in this site:

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Triangles/Congruence-tests-for-triangles.lesson>Congruence tests for triangles</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/Triangles/Problems-on-congruence-tests-for-triangles.lesson>Problems on congruence tests for triangles</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=http://www.algebra.com/algebra/homework/word/geometry/Problems-on-congruence-tests-for-triangles-2.lesson>Problems on congruence tests for triangles-2</A>


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<U>Comment from student</U>: Thanks for your help. On the sheet I have it did say that there was 
AAS (angle, angle,side), SSS(side,side,side), SAS(side,angle,side),ASA(angle,side,angle). 
I just didn't know when to use them, but thanks for you help I understand better.
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<U>My response</U>: In addition to what I wrote above, look in this lesson <A HREF=http://www.algebra.com/algebra/homework/Triangles/Compendium-of-properties-of-triangles.lesson>PROPERTIES OF TRIANGLES</A>.


This file is the list of my lessons on triangles. 
Many lessons of this list contain concrete applications of the triangle congruency tests.


You can learn it directly from this list.