Proving Triangles Congruent: SSS and SAS

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Presentation transcript:

Proving Triangles Congruent: SSS and SAS GEOMETRY – SECTION 4.3

Side-Side-Side (SSS) Congruence Postulate If 3 sides of one triangle are congruent to 3 sides of another triangle, then the two triangles are congruent. If all 3 sides match, then .

Side-Angle-Side (SAS) Congruence Postulate If 2 sides of one triangle and the angle they form are congruent to 2 sides of another triangle and the angle they form, then the triangles are congruent.

Decide if the triangles are congruent Decide if the triangles are congruent. If so, state the congruence postulate that applies.

Decide if the triangles are congruent Decide if the triangles are congruent. If so, state the congruence postulate that applies.

Decide if the triangles are congruent Decide if the triangles are congruent. If so, state the congruence postulate that applies.

Assignment p. 216: 2-17

CONGRUENT TRIANGLE PROOFS (SSS, SAS) Geometry – Section 4.3

Write a proof. Given: Prove: STATEMENTS REASONS

Write a proof. Given: Prove: Given Given Linear pair Reflex. Prop. Def. of midpt. SAS Cong. Post.

Assignment p. 217-218: 21-26 Write a two-column proof OR a flow proof (your choice).