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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 :

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 : NCERT Class 10 Mathematics CBSE Solutions.

Triangles

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Answer

In Δ ABC and Δ PQR,

ABQR=24=12\dfrac{AB}{QR} = \dfrac{2}{4} = \dfrac{1}{2}

BCPR=2.55=12\dfrac{BC}{PR} = \dfrac{2.5}{5} = \dfrac{1}{2}

ACPQ=36=12\dfrac{AC}{PQ} = \dfrac{3}{6} = \dfrac{1}{2}

Since,

ABQR=BCPR=ACPQ=12\Rightarrow \dfrac{AB}{QR} = \dfrac{BC}{PR} = \dfrac{AC}{PQ} = \dfrac{1}{2}.

Hence, Δ ABC ~ Δ PQR by S.S.S. axiom.

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