Exemplar exercise problems III — task. Mathematics CBSE, Class 10.

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1. If \(\Delta ABC \sim \Delta EDF\) and \(\Delta ABC\) is not similar to \(\Delta DEF\), then which of the following is not true?

\(AB \cdot EF = AC \cdot DE\)
\(BC \cdot DE = AB \cdot EF\)
\(BC \cdot DE = AB \cdot FD\)
\(BC \cdot EF = AC \cdot FD\)

2. If in two triangles \(DEF\) and \(PQR\), \(\angle D = \angle Q\) and \(\angle R = \angle E\), then which of the following is not true?

\(\frac{EF}{RP} = \frac{DE}{QR}\)
\(\frac{DE}{PQ} = \frac{EF}{RP}\)
\(\frac{EF}{PR} = \frac{DF}{PQ}\)
\(\frac{DE}{QR} = \frac{DF}{PQ}\)

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