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# Check this out!

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Note by Karthik Venkata
1 year, 4 months ago

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Beautiful.. I'll trick my friends with this..ahhahahahaha Lol · 1 year, 4 months ago

Given that the abstract says

We offer a survey of some lesser known or new trigonometric proofs of the Steiner-Lehmus theorem.

It is not surprising that the proofs are more convoluted.

I believe that your proof is pretty standard for this result. Staff · 1 year, 4 months ago

Can you link me any proof similar to mine ? By the way, I edited the link in the post to a much larger repository of Steiner Lehmus proofs. · 1 year, 4 months ago

@Karthik Venkata Is your solution not similar to the decomposition into ABE and ADC given in the PDF? .... .WELL DONE THOUGH :) · 1 year, 4 months ago

Thanks for pointing it out, it is indeed using the same area decomposition technique. Yet, it doesn't really exploit the direct expression for angle bisector length. · 1 year, 4 months ago

It somehow reminds me of Cotangent Rule :P · 1 year, 4 months ago

Hmmm not exactly. Cotagent rule relates $$\theta_{1}$$ and $$\theta_{2}$$ with $$\overline{BD}$$ and $$\overline{CD}$$. · 1 year, 4 months ago