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Centroid of triangle formed by feet of p...

Centroid of triangle formed by feet of perpendicular from (-3,-6,-9) on coordinate axes is

A

(-1,-2,-3)

B

(1,2,3)

C

(1,-2,-3)

D

(1,-2,3)

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • If the feet of the perpendiculars from (3, 4, 5) to the coordinate axes are A, B, C and the angle between AB and AC is Cos^(-1)(9/a) then a =

    A
    `5sqrt(34)`
    B
    `3sqrt(34)`
    C
    `sqrt(34)`
    D
    25

  • If the feet of the perpendiculars from (3, 4, 5) to the coordinates axes are A, B, C and the angle between AB and AC is cos^(-1)((9)/(a)) then a =

    A
    `5sqrt(34)`
    B
    `3sqrt(34) `
    C
    `sqrt(34)`
    D
    25

  • The centroid of the triangle formed with the line x + y = 6 with the coordinate axes is .....

    A
    ( 4 , 0)
    B
    (1 , 3)
    C
    (8 , 1)
    D
    (2 , 2)

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