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The orthocentre of the triangle ABC is '...

The orthocentre of the triangle ABC is 'B' and the circumcentre is 'S' (a, b). If A is the origin, then th co-ordinates of C are

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As B is the orthocentre, `/_B` will be `90^@`.
Also, as S is the circumcenter, it will be the midpoint of AC.
As A is origin and S coordinates is (a,b). Let C co-ordinates are (x,y). Then,
`(x+0)/2 = a and (y+0)/2 = b`.
`x=2a and y = 2b`
So, (x,y) will be (2a,2b) and option A is the correct option.
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