orthocentre Definition

incentre, acute triangle, obtuse triangle, right triangle, interior angle, exterior angle, central angle, spherical angle, semimajor axis, decussative, regular polygon, conic section, major axis, antiparallelogram, tacnode, plane figure, orthodiagonal, spheroconic, latus rectum, octangle, minor axis, amblygon, angle of refraction, orthopinacoid, hypothenuse, plane angle, subtangent, acnode, set square, scalene triangle, semiaxis, solid angle, diclinic, cross of lorraine, clinodiagonal, brachypinacoid, subtense, disphenoid, coordinate axis, magnetic dip, reclination, ellipsoid of revolution, centre of gravity, tangent plane, bisectrix, angle, angle of incidence, semiparabola, angulometer, macropinacoid, triangle, orthocenter, binode, cathetus, brachydiagonal, rhombicosidodecahedron, small circle, polar coordinate, angle of reflection, clinopinacoid, euclidean space, line of force, polar equation, angular distance, radical axis, hendecagon, crunode, nephroid, bitangent, main diagonal, centre of curvature, curvograph, arcograph, angulous, isoclinic, complementary angle, heptangular, demicircle, pinacoid, undecagon, circumnutate, brachydome, radius of curvature, prismatoid, grivation, round angle, isocline, cofunction, spherograph, sexangled, lissajous figure, interaxis, scalenohedron, multangular, orthotomic, loxodrome, pseudosphere, prismoid, macrodiagonal, supplementary angle,