question_answer

\[\Delta ABC\] is an equilateral triangle in which\[AD\bot BC\]\[\Delta ABD\] is congruent to:

A)  \[\Delta ADC\]                       

B)  \[\Delta ACD\]

C)  \[\Delta ABC\]                        

D)  \[\Delta CDA\]

Correct Answer: B

Solution :

    By SSS Criteria\[\Delta ABC\cong \Delta ACD\]