3 Let be a triangle with . Let be the intersection point of the perpendicular bisector of and the internal angle bisector of . Construct points on (extended) and on such that is perpendicular to and is perpendicular to . Let be the intersection point of and .
3 Hayaan ay isang tatsulok na may . Hayaan ang intersection point ng tirik ng panggitnang guhit at ang mga panloob na panggitnang guhit anggulo ng . Makagawa ng puntos on (extended) at on tulad na ay tirik na at ay tirik na . Hayaan ang intersection point ng at .