If `r:R:r_1 = 2:5:12`, then `A=`

In A B C , if r\ : r_1: R=2\ : 12\ :5, where all symbols have their usual meaning, then A B C is an acute angled triangle A B C is an obtuse angled triangle A B C is right angled which is not isosceles A B C is isosceles which is not right angled

In A B C , if r\ : r_1: R=2\ : 12\ :5, where all symbols have their usual meaning, then A B C is an acute angled triangle A B C is an obtuse angled triangle A B C is right angled which is not isosceles A B C is isosceles which is not right angled

In Delta ABC, if r_1=36, r_2=18, r_3=12 , then R=

In a !ABC if r_(1) = 8, r_(2) = 12 and r_(3) = 24, then a =

If r_(1)=8, r_(2)= 12r_(3)=24 then C=

lf a relation R on the set {1, 2, 3} be defined by R ={(1,2)} , then R is:

If ^(5)P_r = 2 ^(6)P_(r-1) then the value of r is

A plane meets the co-ordinate axes at the points A, B, C respectively in such a way that the centroid of Delta ABC is (1, r, r^(2)) for some real r. If the plane passes through the point (5, 5, -12) then r =