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English[en]
2 Consider five points,,, and such that is a parallelogram and is a cyclic quadrilateral. Let be a line passing through . Suppose that intersects the interior of the segment at and intersects line at . Suppose also that . Prove that is the bisector of angle .
Tagalog[tl]
2 Isaalang-alang ang limang puntos,,, at tulad na ay isang paralelogram at ay isang paikot may apat na gilid. Hayaan maging isang linya ng daan . Ipagpalagay na intersects ang loob ng segment na sa at intersects linya sa . Ipagpalagay na din . Patunayan na ang ay ang panggitnang guhit ng anggulo .

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