a ABCD is a parallelogram and [DB] is one of its diagonals.
Use properties of parallel lines to show that Δs ABD and CDB are congruent.
b What are the consequences of this congruence?

a ABCD is a parallelogram and DB is one of its diagonals Use properties of parallel lines to show that Δs ABD and CDB are congruent b What are the consequences class=