In Delta ABC,(1)/(r_(1)^(2))+(1)/(r_(2)^(2))+(1)/(r_(3)^(2))+(1)/(r^(2))=

In a triangle ABC,if (1)/(r_(1)^(2))+(1)/(r_(2)^(2))+(1)/(r_(3)^(2))+(1)/(r^(2))=

In Delta ABC , (1)/(r^(2)) + (1)/( r_1^(2)) +(1)/( r_2^(2)) + (1)/(r_3^(2)) =

In Delta ABC , ( Delta ^(2))/( a^(2) + b^(2) + C^(2)) {(1)/( r_1^(2) ) + ( 1)/( r_2^(2) ) +(1)/( r_3^(2)) +(1)/( r^(2)) } =

Show that (1)/(r^(2))+(1)/(r_(1)^(2))+(1)/(r_(2)^(2))+(1)/(r_(3)^(2))=(a^(2)+b^(2)+c^(2))/(Delta^(2))

In Delta ABC , prove that (1)/( r_1 ) + (1)/(r_2) + (1)/( r_3) = (1)/( r) .

In triangle ABC,((1)/(r)-(1)/(r_(1)))((1)/(r)-(1)/(r_(2)))((1)/(r)-(1)/(r_(3)))=

In Delta ABC, r_1r_2r_3=

In a Triangle ABC, if (1)/(r12)+(1)/(r22)+(1)/(r32)+(1)/(r^(2))=

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