MCQ
In the adjoining figure, $BC = AD$, $\text{CA}\bot\text{AB}$ and $\text{BD}\bot\text{AB}.$ The rule by which $\triangle\text{ABC}\cong\triangle\text{BAD}$ is:
  • A
    $SAS$
  • $RHS$
  • C
    $SSS$
  • D
    $ASA$

Answer

Correct option: B.
$RHS$
In $\triangle\text{ABC}$ and $\angle\text{BAC}=\angle\text{ABD}$
$BAD$, we have (Right angles) 
$BC = AD $(Hypotentuses and Given)
$AB = AB$ (common in both)
Hence, $\triangle\text{ABC}\cong\triangle\text{BAD}$ by $RHS$ criterion.

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