nonagon Definition

enneagon, enneagonal, enneahedron, dodecagon, undecagon, regular polygon, hendecagon, quindecagon, rhombicosidodecahedron, scalenohedron, decahedron, concave polygon, prismatoid, polygon, heptagon, heptahedron, hexahedron, octangle, trihedron, decagon, icosahedron, prismoid, polyhedron, dodecahedron, decahedral, scalene triangle, tetrahedron, septangle, quadrilateral, regular polyhedron, pyritohedron, octahedron, disphenoid, icosidodecahedron, hexoctahedron, conic section, pentahedron, octagon, plane figure, hypotrochoid, interior angle, cuboctahedron, acute triangle, parallelogram, tetrahexahedron, hexagon, hypocycloid, planoconcave, parallelepiped, dipyramid, right triangle, spheroconic, sexangled, incentre, geometral, antiparallelogram, spherical angle, sexangle, triangle, obtuse triangle, dihedron, paraboloid, equilateral triangle, ennea, isosceles triangle, trisoctahedron, tangent plane, tetartohedral, projective geometry, rectangle, set square, exterior angle, isosceles, platonic solid, epicycloid, bisector, antiprism, orthocentre, euclidean space, circumcircle, rhombus, polytope, hemihedral, transfinite number, amblygon, ellipsoid of revolution, hedron, rectangularity, holohedral, vertex, trirhomboidal, heptangular, tacnode, cubane, geometry, xyz, triangularity, trapezoid, orthocenter, apothem,