In a triangle ASBC, let `/_C=pi/2. If r` is the in radius and R is the circumrdius of the triangle then `2(r+R)` is equal to (A) `a+b` (B) `b+c` (C) `c+a` (D) `a+b+c`

In triangle ABC, let angle C = pi//2 . If r is the inradius and R is circumradius of the triangle, then 2(r + R) is equal to

In triangle ABC, let /_c=(pi)/(2) .If r is the inradius and R is circumradius of the triangle, then 2(r+R) is equal to a+b(b)b+cc+a(d)a+b+c

If R denotes the circum-radius of a Delta ABC , then (b^(2)-c^(2))/(2aR) is equal to

In a triangle ABC, A - B =120 ^(@) and R = 8r, then the value of cos C is

In a triangle a = 13 , b = 14, c = 15, r =

In a triangle , if r_(1) = 2r_(2) = 3r_(3) , then a/b + b/c + c/a is equal to

Let a,b,c are sides and R is the circumradius of a triangle ABC such that R(b+c)=a sqrt(bc) if B+C=(lambda pi)/(mu),lambda,mu in N and are coprime then lambda+mu is

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

Consider a triangle ABC and let a , b , and c denote the lengths of the sides opposite to vertices A , B and C respectively. suppose a = 6 , b = 10 and the area of the triangle is 15sqrt3 . If angleACB is obtuse and if r denotes the radius of the in circle of the triangle , then r^(2) is equal to