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    				| 1. | Find the coordinates of the incentre and centroid of the triangle whosesides have the equations `3x-4y=0,12 y+5x=0 and y-15=0.` | 
| Answer» 3x=4y 3x=4*15 x=20 x=-36 A(0,0),B(20,15).C(-36,15) Centroid`=((0+20+(-36))/3,(0+15+15)/3)` `=(-16/3,10)` `a=sqrt((20+36)^2+0^2)=sqrt((56)^2)=56` `b=sqrt(36^2+15^2)=39` `c=sqrt(20^2+15^2)=25` | |