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In a right triangle ABC (see the figure below) incircle O is tangent to AC, AB, and BC at D, E, and F, respectively. DO extended meets BC at G. Prove that AB^{2} = 2AD.DG.

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Home | Search | Geometry | Problems | All Problems | Open Problems | Visual Index | 1101-1110 | Triangle | Right Triangle | Circle | Incircle | Tangent Line | Email | Post a comment or solution | By Antonio GutierrezLast updated: Mar 22, 2015