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  • [[File:Trapezoid 17.png|400px|right]] [[File:Common circle.png|330px|right]]
    54 KB (9,416 words) - 07:40, 18 April 2024
  • ...AC,</math> then <math>\angle C = \angle B;</math> the other cases hold by symmetry because the steps are the same. ==Hidden symmetry==
    19 KB (3,291 words) - 12:44, 6 October 2024