Prove Triangles Congruent by ASA and AAS

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Section 4.5

• Prove Triangles Congruent by ASA and AAS

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Homework

• Pg 253 8-13, 33, 34 (only prove 33, 34)

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Vocabulary

• Flow proof uses arrows to show the flow of a
  logical argument.

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Postulate 21 Angle-Side-Angle (ASA) Congruence
Postulate

• If two angles and the included side of one
  triangle are congruent to two angles and the
  included side of a second triangle, then the two
  triangles are congruent.

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Theorem 4.6 Angle-Angle-Side (AAS) Congruence
Theorem

• If two angles and a non-included side of one
  triangle are congruent to two angles and the
  corresponding non-included side of a second
  triangle, then the two triangles are congruent.

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Prove AAS
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Write a flow proof
In the diagram, CE BD and ? CAB
CAD.
ABE ADE
Write a flow proof to show