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DescriptionEyeball theorem proof.svg	English: eyeball theorem $\triangle PQJ\sim \triangle PUA,\,\triangle PQF\sim \triangle VQC\Rightarrow {\frac {x}{r}}={\frac {s}{d}},\,{\frac {y}{s}}={\frac {r}{d}}\Rightarrow x=y\,\square$ Note that in the full graphic for the eyeball theorem (File:Eyeball theorem.svg) we have to prove $\|AB\|=\|CD\|$ , but due to $\|AB\|={\frac {x}{2}},\,\|CD\|={\frac {y}{2}}$ this follows directly from above.
Date	5 October 2022
Source	Own work
Author	Kmhkmh

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