Optical axis. There ya go!
The point from which the circle is drawn IS the center.
a plane
No.
Horizontal
Yes.
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
The line is called the principal axis. It passes through the center of curvature and focus of the mirror.
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.
A concave plane curves inward, like the inside of a bowl, while a convex plane curves outward, like the outside of a ball. Concave planes have a center point where all lines drawn from the edges converge, while convex planes have a center point where all lines drawn from the edges diverge.
The point from which the circle is drawn IS the center.
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/
beam
Circle in 2D is a straight figure drawn on a plane. But if we take it as a sphere,it cannot be straight.