✦ Islamic Geometry — 2D Construction

Star points (n)

Grid type

Colour scheme

Line thickness 0.045

Tile scale 78

Rotation animation

Tiles: 0
Star: {10/4}
Symmetry order: D10 · 20
Grid fold: 4-fold (p4m)

Real compass-and-straightedge construction: n vertices placed on a circle at each grid node, connected every k-th vertex to trace an {n/k} star polygon. When gcd(n,k)>1 the star splits into that many separate rotated components, exactly as in classical girih strapwork. Drag to pan, scroll/pinch to zoom.