In triangle `ABC` if `a=13, b=12, c=15` then `r_1=`

In triangle ABC, if a=13,b=14,c=15 then r_(1)=

In Delta ABC, if a=13, b=14, c=15 then r_2=

In triangle ABC , if a=13,b=14 and c=15 , then sin.(A)/(2)= ...................

In a triangle ABC, if a=13,b=14 and c=15, then angle A is equal to (All symbols used have their usual meaning in a triangle.)

In Delta ABC, if a=13 ,b=14 , c=15 , then r_1=

In Delta ABC, if a= 13, b= 14, c= 15 , then r_2 =

In the triangle A B C, a=13, b=14, c=15 then sin (A)/(2)=

In a triangle ABC if sides a = 13, b =14 and c = 15, then reciprocals of r_(1),r_(2),r_(3) are in the ratio

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