D and E are the mid-points of the sides AB and AC, respectively of ∆ABC. DE is produced to F. To prove that CF is equal and parallel to DA, we need an additional information which is
A∠DAE = ∠EFC
BAE = EF
CDE = EF
D∠ADE = ∠ECF
D and E are the mid-points of the sides AB and AC, respectively of ∆ABC. DE is produced to F. To prove that CF is equal and parallel to DA, we need an additional information which is
A∠DAE = ∠EFC
BAE = EF
CDE = EF
D∠ADE = ∠ECF