Circles, disc and annulus

English: A circle is the set of all points in a plane at a fixed distance, called the radius, from a fixed point, the center.

 See also category: Circles.

For geometry of circle (conic section), see Category:Circle geometry or Circle (Geometry).

Filled

English: This shape, the interior of a circle, is called a disc.

• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 

Outlined

English: These are circles proper or, if not to neglect the line thickness, these are rings.

• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 

Annulus

• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 
• 

• 
• 
• 
• 
• 
• 
• 
• 
• 
• 

• 
  Circle
• 
  Circle with a slash through it
• 
  The Twelve-Mile Circle is an arc of a circle with a twelve-mile radius, with the center of the circle in the center of the town of New Castle, Delaware.
• 
  Blue circle for diabetes
• 
  Gloriole