Answer:
It is B and C.
Step-by-step explanation:
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The proportions that show that the triangles are not similar are:
[tex]\frac{AC}{DF} = \frac{BC}{EF}\\\frac{AB}{DE} = \frac{BC}{EF}[/tex]
Note that two triangles are similar if the ratio of corresponding sides
By comparing the triangles
AC is corresponding to DF
AB is corresponding to DE
BC is corresponding to EF
Any proportions that are not equal prove that the triangles are not similar
[tex]\frac{DF}{AC} = \frac{DE}{AB} \\\frac{4}{3} = \frac{4}{3}[/tex](Shows similarity)
[tex]\frac{AC}{DF} = \frac{BC}{EF} \\\frac{3}{4} \neq \frac{2}{3}[/tex](Does not show similarity)
[tex]\frac{AB}{DE} = \frac{AC}{DF} \\\frac{3}{4} = \frac{3}{4}[/tex](Shows similarity)
[tex]\frac{AB}{DE} = \frac{BC}{EF} \\\frac{4}{3} \neq \frac{2}{3}[/tex](Does not show similarity)
Therefore, the proportions that show that the triangles are not similar are:
[tex]\frac{AC}{DF} = \frac{BC}{EF}\\\frac{AB}{DE} = \frac{BC}{EF}[/tex]
Learn more on similarities of triangle here: https://brainly.com/question/14285697