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Question

Find the sum of coordinates of the orthocentre of the triangle whose sides are x=3,y=4 and 3x+4y=6.

A
(0,0)
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B
(3,0)
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C
(0,4)
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D
(3,4)
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Solution

The correct option is D (3,4)
As we can see that the triangle formed by the given lines is a right angled triangle. The orthocenter is the point where all three altitude of the triangle intersect. Hence, in a right triangle, the vertex of the right angle is where you would expect the altitudes to meet, at 90 degrees, where the legs of the right triangle are perpendicular. Therefore, the coordinates of orthocenter are (3,4).

1425926_1056392_ans_4179f81bd44d449cbb38e06396cd04ba.png

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