Ireally really need with proving this using a two column proof:

given: line ac bisects angle bcd
given: angle abc is congruent to angle adc

prove: line ab is congruent to line ad

i've been trying to figure this out for so long but i seriously can't seem to figure out how to prove the two lines are congruent.

I'm sorry i'd like to help, but i'm rlly bad at it too. I just finished that module and i still don't get it

Best answer that i found on yahoo ok   set :   x= length of 2nd piece in cm  x- 3= length of 1st piece in cm  x-4= length of 3rd piece in cm  then since you know they all came from the 20 cm ribbon you add them together and set them equal to 20x+ x-3 +x-4 = 20  3x - 7= 20  3x= 27  x= 9  the shortest piece is the third piece which is x- 4  x-4  9-4 = 5  the length of the smallest piece is 5 cm.  the other lengths are  9 cm  6 cm