$^{'} I^{'}$ is the incentre of triangle $A B C$ whose corresponding sides are $a, b, c,$ rspectively. $a I A + b I B + c I C$ is always equal to a. $0$ b. $(a + b + c) B C$ c. $(a + b + c) A C$ d. $(a + b + c) A B$

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^{'} I^{'}

is the incentre of triangle

A B C

whose corresponding sides are

a, b, c,

rspectively.

a I A + b I B + c I C

is always equal to a.

0

(a + b + c) B C

(a + b + c) A C

(a + b + c) A B

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Question Text

^{'} I^{'}

is the incentre of triangle

A B C

whose corresponding sides are

a, b, c,

rspectively.

a I A + b I B + c I C

is always equal to a.

0

(a + b + c) B C

(a + b + c) A C

(a + b + c) A B

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