Chambered Nautilus (Nautilus pompilius) on sand dune
Nautilus shells
calculators display
Compass over paper
Geometry study tools horizontal
Analytic geometry
Geometry study tools
Red geometric utensils
Nautilus shell
Ruler pencil and eraser
Ruler pencil and eraser
Ruler pencil and eraser
Ruler and pen
Nautilus Shell
Nautilus shell
Nautilus shell
Detail of Romanesco broccoli, also known as Roman cauliflower
Detail of Romanesco broccoli, also known as Roman cauliflower
Romanesco broccoli on black background
A halved Romanesco broccoli on a white background
slide rule and tables
Analytic geometry gear
Analytic geometry tools
Analytic graph tools
Glasses ruler pencil and chalk