Optical axis. There ya go!
The point from which the circle is drawn IS the center.
a plane
No.
Horizontal
Yes.
optical axis
It's an Optical Axis.
If it is a circular mirror the line would be called a radius. If it is a rectangular or square mirror it would just be called a diagonal or straight line... nothing special
Is it A)focal point B)optical axis C)angle of incidence D)fulcrum
a straight line
Center of curvature !.*-Puro Sinaloa- *.! tt(-.-t)
A chord is a straight line drawn through a circle which divides the circle into two parts. The line can be drawn anywhere in the circle EXCEPT the center where it becomes the diameter.
Rake can be described as an angle at which the headstock of the motorcycle is inclined when compared against a vertical line drawn perpendicular to the ground. Trail is the distance on the ground between a straight line drawn through the center of the front wheel spindle and a line drawn through the center of the headstock axis. Taken from http://bikearama.com/theory/motorcycle-rake-trail-explained/
The point from which the circle is drawn IS the center.
Yes.
beam
Circle in 2D is a straight figure drawn on a plane. But if we take it as a sphere,it cannot be straight.