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Orthocentre of an acute triangle A B C i...

Orthocentre of an acute triangle `A B C` is at the orogin and its circumcentre has the coordinates `(1/2,1/2)dot` If the base `B C` has the equation `4x-2y=5,` then the radius of the circle circumscribing the triangle `A B C ,` is `sqrt(5//2)` b. `sqrt(3)` c. `3/(sqrt(2))` d. `sqrt(6)`

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