GEOMETRY HOMEWORK HELP PLEASE! WRITING PROOFS!?

i am stuck on one of my homework problems. i am in geometry. the problems are : #12. Assign coordinates to each vertex and write a coordinate proof. GIVEN: line AB is congruent to line DC PROOVE: line AC is congruent to line BD. THERE IS NO PICTURE IN THE BOOK! I KNOW THAT IT IS NEEDED BUT THAT IS... show more i am stuck on one of my homework problems. i am in geometry.
the problems are :


#12. Assign coordinates to each vertex and write a coordinate proof.
GIVEN: line AB is congruent to line DC
PROOVE: line AC is congruent to line BD.



THERE IS NO PICTURE IN THE BOOK! I KNOW THAT IT IS NEEDED BUT THAT IS ALL THAT WAS GIVEN.
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