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D and E are the mid-points of the side A...

D and E are the mid-points of the side AB and AC, respectively, of `Delta`ABC. DE is produced to F. To prove that CF is equal and parallel to DA, we need an additional information which is

A

`angle DAE = angle EFC`

B

AE = EF

C

DE = EF

D

`angle ADE = angle ECF`

Text Solution

Verified by Experts

The correct Answer is:
C
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