the vertex A of triangle is at origin. the equation of medians through B and C are 15x-4y=240 and 15x-52y+240=0 respectively. then
a) the incentre of triangle ABC is (12,21)
b) the incentre of triangle ABC is ( 21,12)
c) the orthocentre of triangle ABC is (0,63)
d) the orthocentre of trianlge ABC IS (63,0)
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