In a acute angled triangle ABC, proint D, E and F are the feet of the perpendiculars from A,B and C onto BC, AC and AB, respectively. H is orthocentre. If `sinA=3/5a n dB C=39 ,` then find the length of `A H`

In DeltaABC, angleB and angleC are acute angles. BE and CF are perpendicular from vertices B and C on sides AC and AB respectively. Then BC^(2) is equal to-

A triangle ABC with vertices A=(2,5),B=(5,2) and C=(-1,-1) inscribed on the curve xy-x-x-y-3=0 and H=(alpha,alpha) is orthocentre.Let D,E and F be the feet of perpendiculars from A,B and C on BC,CA and AB respectively and inradius of DEF is r then

In a right-angled triangle ABC , D is the foot of the perpendicular from B on the hypotenuse AC . If AB=3cm and BC=4cm, what is the area of /_\ABD?

In a right angled triangle ABC,D is the foot of the perpendicular from B on the hypotenuse AC . If AB=3cm and BC=4cm, what is the area of /_\ABD

D,E,F are the foot of the perpendiculars from vertices A,B,C to sides BC,CA,AB respectively,and H is the or the centre of acute angled triangle ABC, where a,b,c are the sides of triangle ABC, then