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sindhuja P Grade: 11
```        Let ABCD be a rectangle with AB=a and BC=b.Suppose  r1 is the radius of the circle passing through A and B and touching CD ; r2 is the radius of the circle passing through B and C and touching AD then prove that
r1=a2+4b2/8b and r2=b3+4a2b/8ab```
7 years ago

## Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
```										Dear sindhuja

in triangle AOD
AO2 =AD2 +OD2
r12  = a2/4  + (b-r1)2
r12   = a2/4  +  b2 +r12  -2br1
r1=a2+4b2/8b
Please feel free to post as many doubts on our discussion forum as you can. If you find any question Difficult to understand - post it here and we will get you the answer and detailed solution very quickly. We are all IITians and here to help you in your IIT JEE preparation. All the best.Regards,Askiitians ExpertsBadiuddin
```
7 years ago
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