The external controls, safety mechanisms, and internal components of a standard portable fire extinguisher.

The fundamental geometric components of a triangle including vertices, sides, base, height, and angles.

The acoustic components, structural joints, and tone holes of a standard baroque recorder.

The fundamental components of standard sheet music notation, including the staff, clef, time signature, barlines, and basic note values.

Standard dimensions, lines, and playing areas of a regulation tennis court.

The standard classical proportion guidelines and anatomical landmarks used to draw and measure the human face.

Standard dimensions, boundary lines, zones, and court markings of a regulation volleyball court.

Main surface anatomical regions and features of the human face.

The fundamental sides, angles, and relationships of a right triangle used to define trigonometric ratios.

Standard 400-metre track and field stadium layout including running lanes, straightaways, and infield event sectors.