In DeltaDEF ,measure of angle E is 90^(@...

In `DeltaDEF` ,measure of angle E is `90^(@)`.If `secD=(25)/(7)andDE=1.4`cm ,the what is the length (in cm.)of side DF?

A

5

B

4.8

C

4

D

5.6

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The correct Answer is:

A

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