Question

Suppose AB = 10 cm, BC = 9 cm, AC = 11 cm, DE = 11 cm, and DF = 9 cm. What else do you need to know to prove that the two triangles are congruent by SSS?

a.
EF = 9 cm
c.
EF = 10 cm
b.
EF = DE
d.
EF = DF

Answer 1

Two triangles must be congruent by SSS when their all sides would be equal.
So, BC = DF
AC = DE
Then, AB = EF = 10

In short, Your Answer would be Option B

Hope this helps!