In `Delta ABC, if r-1,R=4, Delta =8`, then ab+bc+ca=

In Delta ABC,r=1,R=4,Delta=8 then the value of ab+bc+ca=

In Delta ABC, (ab-r_1 r_2)/r_3=

In Delta ABC, (r_1 r+r_2 r_3)/(bc)=

In Delta ABC , it is given that AB= 9 cm, BC= 6 cm, and CA=7.5 cm . Also Delta DEF is givne such that EF=8 cm and Delta DEF~ Delta ABC . Then perimeter of Delta DEF is

AL, BM and CN are perpendicular from angular points of a triangle ABC on the opposite sides BC, CA and AB respectively. Delta is the area of triangle ABC, (r ) and R are the inradius and circumradius. If area of Delta LMN is Delta ', then the value of (Delta')/(Delta) is

AL, BM and CN are perpendicular from angular points of a triangle ABC on the opposite sides BC, CA and AB respectively. Delta is the area of triangle ABC, (r ) and R are the inradius and circumradius. If area of Delta LMN is Delta ', then the value of (Delta')/(Delta) is

AL, BM and CN are perpendicular from angular points of a triangle ABC on the opposite sides BC, CA and AB respectively. Delta is the area of triangle ABC, (r ) and R are the inradius and circumradius. If perimeters of DeltaLMN and Delta ABC an lamda and mu, then the value of (lamda)/(mu) is

AL, BM and CN are perpendicular from angular points of a triangle ABC on the opposite sides BC, CA and AB respectively. Delta is the area of triangle ABC, (r ) and R are the inradius and circumradius. If perimeters of DeltaLMN and Delta ABC an lamda and mu, then the value of (lamda)/(mu) is