MCQ
If in $\triangle\text{ABC} $ and $\triangle\text{DEF},\frac{\text{AB}}{\text{DE}}=\frac{\text{BC}}{\text{FD}}, $ then they will be similar, when :
  • $\angle\text{B}=\angle\text{E}$
  • B
    $\angle\text{B}=\angle\text{D}$
  • C
    $\angle\text{A}=\angle\text{D}$
  • D
    $\angle\text{A}=\angle\text{F}$

Answer

Correct option: A.
$\angle\text{B}=\angle\text{E}$
In $\triangle\text{ABC} $ and $\triangle\text{DEF},\frac{\text{AB}}{\text{DE}}=\frac{\text{BC}}{\text{FD}}, $
then if, $\angle\text{b}=\angle\text{d} \ ($the included angles$)$ are equal then the traingles are similar.​​​​​​​

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