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Question

The vertices of a ΔABC are A(5,2), B(7,6) and C(5,4). Then

A
measure of angle B is π4
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B
equation of the altitude drawn from the vertex C has the equation 3x+2y7=0
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C
orthocentre of the triangle does not lie inside the ΔABC
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D
all of these
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Solution

The correct option is D all of these
Given the vertices of ABC
i.e, C(5,-4) A(-5-2) and B(7,6)
let CD be the altitude such that CDB becomes a right angle triangle and angle B=45 degree
To find the midpoint D,
(5+72,2+62)=(1,2)
The equation of altitude drawn fron vertex C,
yy1y2y1=xx1x2x1y+42+4=x515y+46=x544y16=6x303x+2y7=0
The orthocenter is not always inside the triangle of the triangle is obture,it will be outside

892643_296377_ans_da217665db934d0682d65292b6961391.png

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