Prove triangle abd is congruent to triangle acd

So based on your question where there are two triangle whose both points is equidistant to each other and known as variable C and variable B. So the correct answer among the following step that proves that C and B is equidistant to each other and its letter C. Triangle ABD is similar to triangle ACD

Multiply 9 and 67. then multiply 3 with 67. lastly the answer that you got for 9x67 is to be subtracted by the answer you got for 3x67