How many such triangles can exist where `s=5,r=1` and `R=3` (where `s=` semi perimeter, `r`= inradius; `R=` circum radius)

One side of equilateral triangle is x+y=3 , centroid is (0,0) , then r+R= (where r is inradius and R is circumradius)

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

Formulae OF inradius(r)||ex-radius(r1,r2,r3)

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

Let ABC be an isosceles triangle with base BC. If r is the radius of the circle inscribsed in DeltaABC and r_(1) is the radius of the circle ecribed opposite to the angle A, then the product r_(1) r can be equal to (where R is the radius of the circumcircle of DeltaABC )

In a !ABC if r_(1) = 36 , r_(2) = 18 and r_(3) = 12 , then the perimeter of the triangle , is

In a equilateral triangle r, R and r_(1) form (where symbols used have usual meaning)