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4-2 Triangle Congruence by SSS and SAS

4-2 Triangle Congruence by SSS and SAS. Side-Side-Side Postulate. If the three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent. Using SSS. Included Angles.

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4-2 Triangle Congruence by SSS and SAS

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  1. 4-2 Triangle Congruence by SSS and SAS

  2. Side-Side-Side Postulate If the three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent.

  3. Using SSS

  4. Included Angles • You can also show relationships between a pair of corresponding sides and an included angle. Side-Angle-Side Postulate: If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the two triangles are congruent.

  5. Using SAS • What other information do you need to prove DEF  FGD by SAS? What other information do you need to prove LEB BNL by SAS?

  6. Identifying Congruent Triangles Would you use SSS or SAS to prove the triangles congruent or is there not enough information to prove them congruent?

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