Mathematics

State which pairs of triangles are similar. Write the similarity criterion used by you for answering the question and also write the pairs of similar triangles in the symbolic form :

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In Δ ABC and Δ DFE,

$\dfrac{AB}{DF} = \dfrac{2.5}{5} = \dfrac{1}{2}$

$\dfrac{BC}{EF} = \dfrac{3}{6} = \dfrac{1}{2}$

$\therefore \dfrac{AB}{DF} = \dfrac{BC}{EF} = \dfrac{1}{2}$

∠A = ∠F.

∠B must be equal to 80° as the sides AB, BC includes ∠B , not ∠A.

Hence, the triangles are not similar

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