If in `DeltaABC CosB=3/5 , AB=5 and R=5 ` (`R` is circumradius). then find area of `Delta`

In a Delta ABC, 2s= perimeter and R = circumradius. Then, find s/R.

If in a Delta ABC, AD, BE and CF are the altitudes and R is the circumradius, then find the radius of the DEF.

In DeltaABC , a=5, b=7, c=8, find cosB/2

In DeltaABC, let b=6, c=10and r_(1) =r_(2)+r_(3)+r then find area of Delta ABC.

In Delta ABC , if a = 10 and b cot B + c cot C = 2(r + R) then the maximum area of DeltaABC will be

Two sides of triangle ABC are 5 and 12. Area of DeltaABC=30 Find 2R+r where R is circumradius and r is inradius.

In a right angled triangle ABC, if r(in radius)=7 cm and R(Circumradius) = 32.5 cm, then the area of the triangle (in square cm ) is………………..