# Why should the corresponding angles be included angles in order to use the SAS triangle congruence theorem?

• Why should the corresponding angles be included angles in order to use the SAS triangle congruence theorem?

... SSS and SAS. We have learned that triangles are ... to the other triangle's parts, then we cannot use the SAS ... the Vertical Angles Theorem.
Positive: 55 %
Congruent Triangles. ... we only need to worry about proving congruence between corresponding angles. We are ... we can use the Third Angles Theorem.
Positive: 52 %

### More resources

... congruent to two corresponding angles and a non-included side ... triangle congruence theorem is logically ... Why do we have to use three ...
Positive: 55 %
Chapter 5 Congruence Theorems ... ASA Postulate If two angles and the included side of one triangle are ... case of the SAS Congruence Theorem.
Positive: 50 %
... prove similar triangles. SSS, AA and SAS, ... triangle are equal to 2 corresponding angles of the ... congruent angles so you can use the AA Theorem.