Circumradius and Inradius

The area of the right angled triangle in terms of its circum radius and inradius is

Half angle formulae| Area of triangle inradius| Circumradius and exradii

Find the ratio of circumradius to inradius . If the ratio of sides is 5:7:8 .

In an equilateral triangle, inradius r , circumradius R and ex-radius r_1 are in A.P. (b) G.P. (c) H.P. (d) none of these

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

In DeltaABC, R, r, r_(1), r_(2), r_(3) denote the circumradius, inradius, the exradii opposite to the vertices A,B, C respectively. Given that r_(1) :r_(2): r_(3) = 1: 2 : 3 The sides of the triangle are in the ratio

In DeltaABC, R, r, r_(1), r_(2), r_(3) denote the circumradius, inradius, the exradii opposite to the vertices A,B, C respectively. Given that r_(1) :r_(2): r_(3) = 1: 2 : 3 The value of R : r is