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a triangle ABC,if r1 is the exradius of the excircle opposite to A,r2 is the exradius of the excircle opposite to B and r3is the exradius of the excircle opposite to C.... In prove that ( ar 1 +br 2 +cr 3 )/abc=(1/r)-(1/2R) where r is the inradius and R is the circum radius.solytion of trainle


a triangle ABC,if  r1 is the exradius of the excircle opposite to A,r2 is the exradius of the excircle opposite to B and r3is the exradius of the excircle opposite to C....


In prove that (ar1+br2+cr3)/abc=(1/r)-(1/2R)


where r is the inradius and R is the circum radius.solytion of trainle


Grade:12

2 Answers

Rahul Kumar
131 Points
9 years ago

Hi Anil,

You font size is very small, please increase it and post again so that we can reply that

Regards

anil kumar jha
10 Points
9 years ago

properties of triangles. in the following problem, In a triangle ABC,if r1 is the exradius of the excircle opposite to A,r2 is the exradius of the excircle opposite to B and r3is the exradius of the excircle opposite to C.... prove that (ar1+br2+cr3)/abc=(1/r)-(1/2R) where r is the inradius and R is the circum radius. i tried using these formulae: r1=(area of triangle)/(s-a) r1=stanA/2 but i cudnt solve it.how should i start?

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