In triangle ABC, the equation of side BC is x−y=0. Circumcentre and orthocentre of the triangle are (2,3) and (5,8) respectively. Equation of circumcircle of the triangle is
A
x2+y2−4x+6y−27=0
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B
x2+y2−4x−6y−27=0
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C
x2+y2+4x+6y−27=0
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D
x2+y2+4x−6y−27=0
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Solution
The correct option is Dx2+y2−4x−6y−27=0 Reflection of orthocenter P(5,8) in BC(x−y=0) will lie on circumcircle. Clearly P1≡(8,5). Thus, the equation of circumcircle with center O(2,3) and passing through P(8,5) is (x−2)2+(y−3)2=(8−2)2+(5−3)2 i.e, x2+y2−4x−6y−27=0