Answer:
Side AC is congruent to side DF
Step-by-step explanation:
We are given that
Side AB=5 cm
BC=6 cm
Side DE=5 cm
Side EF= 6cm
We have to find an additional information would need to prove that [tex]\triangle ABC\cong \triangle DEF [/tex] by SSS.
When two triangles are congruent by SSS it means three sides of one triangle are congruent to corresponding sides of other triangle.
We have in triangle ABC and triangle DEF
[tex]AB\cong DE=5 cm[/tex]
[tex]BC\cong EF=6 cm[/tex]
[tex]AC\cong DF[/tex]
Then ,[tex]\triangle ABC\cong \triangle[/tex]DEF
Reason: SSS postulates
Answer: Side AC is congruent to side DF