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Question

In the adjacent figure, 'P' is any arbitrary interior of the triangle ABC, H_a, H_b, H_c are the length of altitudes drawn from vertices A, B and C respectively. If x_a, x_b and x_c represent the distance of 'P' from sides BC, AC and AB respectively, then

xaHa+xbHb+xcHcis always equal to


A

3

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B

2

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C

1

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D

1/3

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Solution

The correct option is C

1


We have,Δ=ΔBPC+ΔAPC+ΔAPB=Δ=12axa+12bxb+12cxcAlso,Δ=12aHa=12bHb=12cHcΔ=Δ(xaHa+xbHb+xcHc)=xaHa+xbHb+xcHc=1


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