Chapter 6.4 Notes: Prove Triangles Similar by AA

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Chapter 6.4 Notes Prove Triangles Similar by AA

• Goal You will use the AA Similarity Postulate.

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• Triangle Similarity
• Postulate 22 Angle-Angle (AA) Similarity
  Postulate
• If two angles of one triangle are congruent to
  two angles of another triangle, then the two
  triangles are similar.

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• Ex.1 Determine whether the triangles are
  similar. If they are, write a similarity
  statement. Explain your reasoning.

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• Ex.2 Show that the two triangles are similar.
• a. ?ABE and ?ACD
• b. ?SVR and ?UVT

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• Ex.3 Show that the triangles are similar. Write
  a similarity statement.
• a. ?FGH and ?RQS
• b. ?CDF and ?DEF

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• Ex.4

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• Ex.5 A school building casts a shadow that is 26
  feet long. At the same time a student standing
  nearby, who is 71 inches tall, casts a shadow
  that is 48 inches long. How tall is the building
  to the nearest foot?