Example image of eyePlorer eyePlorer map for 'Incircle and excircles of a triangle': Circle Geometry Tangent Triangle Bisection Orthocentric system Tangent lines to circles Area Heron's formula Nine-point circle Incircle and excircles of a triangle Symmedian Circumscribed circle Law of sines Trilinear coordinates Cartesian coordinate system Barycentric coordinates (mathematics) Cut-the-Knot Bonnesen's inequality Euler's theorem in geometry Extouch triangle Japanese theorem for cyclic polygons Japanese theorem for cyclic quadrilaterals Schiffler's theorem Spieker circle Fuhrmann circle Isogonal conjugate List of geometers Nagel point Olry Terquem Steiner inellipse Tangential quadrilateral Triangle center Carnot's theorem Conway triangle notation Encyclopedia of Triangle Centers List of circle topics List of triangle topics Schiffler point List of geometry topics Semiperimeter Concurrent lines Equilateral triangle Regular polygon Pedal triangle Euler line Thébault's theorem Wythoff construction Centre (geometry) Ideal triangle