Warm-Up! Find the Distance and Midpoint between the two points (-12, 6) and (-4, -3)

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4-2 Triangle Congruence by SSS and SAS

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Presentation transcript:

Warm-Up! Find the Distance and Midpoint between the two points (-12, 6) and (-4, -3)

4.2 Triangle Congruence by SSS and SAS 12/4

Learning Target I can prove two triangles congruent using the SAS and SSS postulates.

Vocabulary Side-Side-Side (SSS) Postulate: If three sides of one triangle are congruent to the three sides of another triangle, then the two triangles are congruent.

SSS Example ABC ≅ DEF

Vocabulary Side-Angle-Side (SAS) 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.

SAS Example CBA ≅ FED

Practice: 4-2 Worksheet

Practice 1-9 on the 4-2 worksheet.

Practice Proving Together 14 and 15 on the 4-2 Worksheet.

Recap Questions Do you know what SSS and SAS means? Can you identify two congruent triangles with the SSS and SAS Postulates? Can you provide Reasoning in a Proof?

Homework: P #1-21 all, skip 7 Due Monday