1.

For triangle ABC, R = 5/2 and r=1. Let I be the incenter of the triangle and D, E, and F be the feet ofthe perpendiculars from I to BC,CA and AB, respectively. The value of (IDxx IExxIF)/(IAxxIBxxIC) is equal to

Answer»

`(5)/(2)`
`(5)/(4)`
`(1)/(10)`
`(1)/(5)`

ANSWER :C


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