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Questions  

 If A(5,2),B(10,12) and P(x,y) is such that APPB=32 ,  then the internal bisector of APB always passes through 

a
(20,32)
b
(8,8)
c
(8, -8)
d
(-8, -8)

detailed solution

Correct option is B

Let internal bisector of ∠APB meets the side AB at C .  We know that ACBC=APPB∴ ACBC=32∴ coordinates of C are 3(10)+2(5)3+2,3(12)+2(2)3+2 or (8,8) Hence the internal bisector of ∠APB always passes through  point (8,8)

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