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माना एक त्रिभुज के शीर्ष `(0,0),( 2,-1) ` तथा `(1,-3) ` है| इस त्रिभुज के लम्भिक केंद्र के निर्देशांक ज्ञात कीजिए|

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माना त्रिभुज के शीर्ष ` A,B ` व C है|
तब ` " "A-=A (0,0) B-=B (2,-1) ` तथा `C-=C (-1,3) `
स्पष्टतः ` " "AL bot BC `
` therefore ` रेखा AL का समीकरण ` " " y-0 =-((2+1)/( -1-3)) (x-0)`
` " " ` (यहाँ BC की प्रवणता ` = ( -1-3)/( 2+1 ) `)
` rArr " " 4y =3 x`
` rArr " " 3x- 4y =0 " "...(i)`
अब क्योंकि `BM bot AC , ` इसलिए BM का समीकरण
` " " y+ 1=- (0+1)/(0-3) (x-2)`
` (##BLJ_HIN_MAT_XI_C14_SLV_076_S01.png" width="80%">

`rArr" " x- 3y =5 `
समीकरण (i ) व )(ii ) को हल करने पर, ` x=- 4 ,y =- 3`
` therefore ` त्रिभुज के लम्भिक केंद्र के निर्देशांक `=(-4 ,-3) `

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