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Tringle abc is right angle at b and d is mid point of bc prove that ac--4ad -3ad?
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Tringle abc is right angle at b and d is mid point of bc prove that ac...
ABC is a right angled at B and D is the midpoint of BC.
In ∆ABD 
AD^2= AB^2+BD^2
[By Pythagoras theorem]
In ∆ ABC
AC^2= AB^2+BC^2
From equation (1)
AD^2= AB^2+ (BC/2)^2
[D is the midpoint of BC]
AD^2= AB^2+ BC^2/4
AD^2= AB^2/1+ BC^2/4
4AD^2= 4AB^2+ BC^2
BC^2= 4AD^2-4AB^2
Using the value of BC^2 in eq. 2
AC^2=AB^2+4AD^2-4AB^2
AC^2=AB^2-4AB+4AD^2
AC^2= 4AD^2-3AB^2

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Tringle abc is right angle at b and d is mid point of bc prove that ac--4ad -3ad?
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