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2. Hexafoil - Wikipedia

   en.wikipedia.org/wiki/Hexafoil

   A geometrical hexafoil. The hexafoil is a design with six-fold dihedral symmetry composed from six vesica piscis lenses arranged radially around a central point, often shown enclosed in a circumference of another six lenses.

3. Spoke - Wikipedia

   en.wikipedia.org/wiki/Spoke

   For example, a 32 spoke wheel has 16 spokes per side, 360° divided by 16 equals 22.5°. Multiply 22.5° ("angle between adjacent flange holes") by the number of crossings to get the angle a—if 3-crosses, the 32 spoke wheel has an angle a of 67.5°.

4. Wagon-wheel effect - Wikipedia

   en.wikipedia.org/wiki/Wagon-wheel_effect

   The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation ...

5. Display stand - Wikipedia

   en.wikipedia.org/wiki/Display_stand

   A display stand is a free-standing physical fitting in a shop on which products are arranged. It is an advertising and merchandising tool that has a direct impact on product sales. [1] Artwork or statuary may also have a display stand to hold items securely for viewing.

6. Zoetrope - Wikipedia

   en.wikipedia.org/wiki/Zoetrope

   John Bate described a simple device in his 1634 book "The Mysteries of Nature and Art". It consisted of "a light Card, with severall images set upon it", fastened on the four spokes of a wheel, which was turned around by heat inside a glass or horn cylinder, "ſo that you would think the immages to bee living creatures by their motion". [6]

7. Playart - Wikipedia

   en.wikipedia.org/wiki/Playart

   Most of the models in Appendix 2 are number above 7147 and can be found with the 5 spoke wheel. Like Hot Wheels and Matchbox "Superfast", Playart cars had thin axle, fast spinning 'mag' wheels. Models released during the 1970s had metal bodies as well as metal bases which were usually painted 'chrome' with the unmistakable Playart script.