Isotoxal figure 2-dimensional tessellation constructed from regular polygons is isotoxal. For instance, the truncated icosahedron (the familiar soccerball) has two types of edges: hexagon-hexagon and hexagon-pentagon, and it is not possible for a symmetry of the solid to move a hexagon-hexagon edge onto a hexagon-pentagon edge. An isotoxal polyhedron has the same dihedral angle for all edges. There are nine convex isotoxal polyhedra formed from the Platonic solids, 8 formed by the Kepler–Poinsot polyhedra, and six more as quasiregular (3 | p q) star polyhedra and their duals. There are at least 5 polygonal tilings of the Euclidean plane that are isotoxal,
A Plane Is Born of paint and Mark applies the decals to make it unique. Finally it is the turn of Tony Palmer to show us his own pride and joy - his Avid Speedwing. - Up, Up & Away! The final episode in the series sees the newly built plane go through the final checks it needs for its certificate of air-worthiness. Will it pass and can Mark finally realise his dream to fly his very own aeroplane? A Plane Is Born A Plane is Born, presented by Mark Evans, was a 15 part series for Discovery Home and Leisure (now Discovery Real