Example image of eyePlorer eyePlorer map for 'Midpoint': Histogram Line segment Point (geometry) Distance Formula Butterfly theorem Medial triangle Median (geometry) Minor grand trine Marden's theorem Symmedian Uranian astrology Bisection Nine-point circle Reinhold Ebertin Altitude (triangle) Archimedes' quadruplets Outer billiard The Geometer's Sketchpad Circumscribed circle Ruth Brummund Salinon Schläfli orthoscheme Grey Peaucellier-Lipkin linkage Huzita–Hatori axioms Sense and reference North West Metro Affine differential geometry Analytic geometry Triangle Circle Invalid proof Mandelbrot set