Triangles congruent by SSS proofs

Lessons

• Introduction
  a)

  1. Similar tirangles VS. Congruent triangles
  2. Ways to prove congruency:
  • SSS
  • SAS
  • ASA
  • AAS
  
  

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• 1.
  Explain why $\triangle ABD$ $\cong$ $\triangle CDB$.
  
  

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• 2.
  Decide and explain if $\triangle LMP$ $\cong$$\triangle XYZ$ using the following coordinates.
  a)

  L(1, 1), M(3, 4), P(5, 1), X(-5, -4), Y(-3, -1), Z(-1, -4)
  
  
  b)

  L(2, -2), M(6, -1), P(2, 6), X(-2, -2), Y(2, -1), Z(0, -5)
  
  
  c)

  L(1, -1), M(-1, 4), P(5, 4), X(2, 6), Y(5, 12), Z(5,6)
  
  

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