Example image of eyePlorer eyePlorer map for 'Concurrent lines': Geometry Intersection Line (geometry) Point (geometry) Triangle Altitude (triangle) Incircle and excircles of a triangle Circumscribed circle Duality (projective geometry) Projective geometry Isogonal conjugate Tarry point Thomson cubic Ceva's theorem Splitter (geometry) Cleaver (geometry) Nagel point Pappus's hexagon theorem List of equations in classical mechanics Collinearity Concurrency Fermat point Émile Lemoine