Determine whether the triangles are similar by AA~, SSS~, SAS~, or not similar.

Question image

Understand the Problem

The question is asking whether two triangles are similar using the criteria of AA (Angle-Angle), SSS (Side-Side-Side), SAS (Side-Angle-Side), or to determine if they are not similar. This involves comparing the corresponding sides and angles of the two triangles.

Answer

Not Similar
Answer for screen readers

The triangles are Not Similar.

Steps to Solve

  1. Identify the sides of the triangles

For triangle ( CED ):

  • Side ( CE = 96 )
  • Side ( ED = 80 )
  • Side ( CD = 64 )

For triangle ( LMN ):

  • Side ( LM = 54 )
  • Side ( MN = 36 )
  • Side ( LN = 45 )
  1. Determine the ratios of corresponding sides

Now let's find the ratios of corresponding sides:

  • Ratio of ( CE ) to ( LM ): $$ \frac{CE}{LM} = \frac{96}{54} = \frac{16}{9} $$

  • Ratio of ( ED ) to ( MN ): $$ \frac{ED}{MN} = \frac{80}{36} = \frac{20}{9} $$

  • Ratio of ( CD ) to ( LN ): $$ \frac{CD}{LN} = \frac{64}{45} $$

  1. Compare the ratios for similarity

To determine if the triangles are similar by SSS, all ratios must be equal. Compare the calculated ratios:

  • ( \frac{CE}{LM} = \frac{16}{9} )
  • ( \frac{ED}{MN} = \frac{20}{9} )
  • ( \frac{CD}{LN} ) has different= values

Since ( \frac{96}{54} ) and ( \frac{80}{36} ) are not equal, the triangles are not similar by SSS.

  1. Check angles if applicable (AA or SAS)

To determine similarity, we must check if any angles correspond. If we do not know angles, we cannot confirm AA or SAS.

Hence, using SSS shows they are not similar, and without angle information, we cannot confirm do AA or SAS.

The triangles are Not Similar.

More Information

In triangle similarity, the Side-Side-Side (SSS) criterion requires that the ratios of all three pairs of corresponding sides be equal for the triangles to be similar. In this case, since not all ratios matched, they are not similar.

Tips

  • Assuming triangles are similar without checking all side ratios.
  • Forgetting to simplify ratios when comparing.
  • Not having or checking angle information when needed.

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