A note on the barycentric square root of Kiepert perspectors - Khoa Lu Nguyen Let P be an interior point of a given triangle ABC. We prove that...
On the mixtilinear incircles and excircles - Khoa Lu Nguyen and Juan Carlos Salazar A mixtilinear incircle (respectively excircle) of a triangle...
On the complement of the Schiffler point - Khoa Lu Nguyen Consider a triangle ABC with excircles (I_a), (I_b), (I_c), tangent to the nine-point...
A synthetic proof of Goormaghtigh's generalization of Musselman's theorem - Khoa Lu Nguyen We give a synthetic proof of a generalization by...
