How can tartar and plaque be removed from teeth without grinding? is there any paste, etc. for it?
The girders of a suspension bridge form an arc. The definition of an arc is a curve or bowed shape, like a part of a circle. An example of an arc is a rainbow. To arc is defined as to make a curved shape or move in a curved path.
Introduction: A circle is all points equidistant from one point called the center of the circle. Segments drawn within, through, or tangent to the circle create angles which we can define and measure. Important facts: The measure of a central angle is the same as the measure of the intercepted arc.