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