If in a triangle `r_1=r_2+r_3+r`; Prove that triangle is right angled.

If r_1=r_2+r_3+r prove that the triangle is right angled .

If in any triangle r=r _(1) - r_(2) - r_(3), then the triangle is

If in a triangle ABC, r_(1)+r_(2)+r_(3)=9r , then the triangle is necessarily

In triangle ABC, if rr_(1)=r_(2)r_(3), then the triangle is

If r_(1) +r_(2)+ r = r_(3), then show that Delta is right angled.

If in a triangle (r)/(r_(1)) = (r_(2))/(r_(3)) , then

In A B C , if r\ : r_1: R=2\ : 12\ :5, where all symbols have their usual meaning, then A B C is an acute angled triangle A B C is an obtuse angled triangle A B C is right angled which is not isosceles A B C is isosceles which is not right angled

In a right angle triangle,if r=2,R=6 then area of the triangle is (A) 14 (B) 42 (C) 28 (D) 56