Question

If (2,1),(1,2),(3,3) are midpoints of sides BC, CA, AB of triangle ABC then the equation of AB

Answer 1

In ∆ABC the length of sides BC,CA and AB are a,b and c respectively. Median AD drawn from A is perpendicular to BC then b is?
1)√(a^2+c^2)
2)√(c^2-a^2)
3)√(a^2-3c^2)
4)√(a^2-c^2)

The answer is √(a^2-3c^2)