A Cone.
A point
If your asking "What is ...?" Then, the answer is a circle. This is the definition of a circle!
You are a cone. You can see a picture of a cone and lots more information at http://en.wikipedia.org/wiki/Cone_(geometry)
Circle
It could be a circle or a sphere
A point
The center of a circle is an example of a point equidistant from all points on the circle's circumference, serving as the geometric midpoint of the shape. It is a key element for defining the circle's properties and relationships with other geometric figures.
All points equidistant from a center point.
tangent
If your asking "What is ...?" Then, the answer is a circle. This is the definition of a circle!
tangent
You are a cone. You can see a picture of a cone and lots more information at http://en.wikipedia.org/wiki/Cone_(geometry)
How about the circumference of a circle generated by a compass.
circle
Circle
It could be a circle or a sphere
That's a circle.It is a circleThat's a circle.