there is a circle say S(adsbygoogle = window.adsbygoogle || []).push({}); _{1},there is a pointPoutside circle. Two tangents are drawn from the pointPto the circle. These two tangents touches circles S_{1}atQandR. A circle is made through P,Q,R. proof that circle is passing through center of S_{1}.

I have tried to put some triangles congruent similar and some other ideas but all failed.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Proof in circles and tangents?

**Physics Forums | Science Articles, Homework Help, Discussion**