This is the "4.2: Congruence and Triangles" page of the "Geometry Chapter 4" guide.
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Geometry Chapter 4   Tags: geometry, mahlman, math  

Last Updated: Jan 19, 2011 URL: http://libguides.mpsaz.net/content.php?pid=110602 Print Guide RSS Updates

4.2: Congruence and Triangles Print Page
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Theorems

Congruent Triangles

ALL angles and ALL sides are congruent to each other.

                                       

Angles

Sides

m<B = m<I

m<A = m<C

m<T = m<E

BA = IC

AT = CE

BT = EI

 

Third Angles Theorem

If two angles of one triangle are congruent to two angles of another triangle, then the third angles are also congruent.

                       1 is congruent to  A

                       2 is congruent to  B

                 Therefore,  3 is congruent to  C

Properties of Congruent Triangles

 

Reflexive Property of Congruent Triangles

Symmetric Property of Congruent Triangles

Transitive Property of Congruent Triangles

Every Triangle is congruent to itself.

If D@ D 2, then D@ D1. If D@ D 2 and D@ D3, then D@ D3.

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