Which step should be used to prove that point A is equidistant from points C and B?

Question

shesolitt · Answer

pleas help meeee @sleepyhead314 @urkhada

shesolitt · Answer

A/ Triangle ABD is congruent to triangle ACD.
B/ Prove that segment AD is perpendicular to BC.
 C/Triangle ABD is similar to triangle ACD.
 D/Prove that segment AD is equal to segment BC.

jim_thompson5910 · Answer

|dw:1444877038540:dw|

jim_thompson5910 · Answer

hopefully you started things off by connect A to C, and A to B?

like this

|dw:1444877127785:dw|

shesolitt · Answer

so its A? @jim_thompson5910

jim_thompson5910 · Answer

let's forget about the answer choices for now

jim_thompson5910 · Answer

did you connect A to B? and A to C? like I showed in the drawing

shesolitt · Answer

yess i did @jim_thompson5910

jim_thompson5910 · Answer

ok now we can pull the two triangles apart

|dw:1444877448916:dw|

jim_thompson5910 · Answer

agreed? or no?

shesolitt · Answer

yes of course @jim_thompson5910

jim_thompson5910 · Answer

AD is equal to itself

AD = AD (reflexive property)

|dw:1444877584600:dw|