Stewart's theorem

Please explain the stewart's theorem.

6 Answers

62
Lokesh Verma ·

it is the extension of the apollonius theorem...

basically if the base is divided in lengths m and n then the relation between the length of the line joining the point of division to the vertex and the remaining sides of the traingle..

Wikipedia does have the reference and a good proof too...

36
rahul ·

a2m + b2n = a (d2 + mn)

i read of this mathematical expression in wikipedia.. but i didn't know what exactly
m and n stands for ....

But sir... this dosen't work in calculating the value of d...!!!!

62
Lokesh Verma ·

you have written a wrong version.. the a in the RHS has to be "c"...

36
rahul ·

Oh... ho... yep...

but though... this dosen't work... i checked it in an equilateral triangle...

on dropping a median from A on BC at D.. and taking any length like 3 units of each of its
sides...

and used this... but of no use...????

62
Lokesh Verma ·

it does..

put a=b=c=x

and m=n=x/2

for the case u mentioned..

you get d=root3/2 x

36
rahul ·

Yup it does.. i m truly sorry... what i did was trully typical...

i took m = n = 1 ... that was a silly mistake... i m truly sorry for wasting ur time sir...

and Thanks...

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