A subpoena duces tecum is a court order requiring the person named in it to produce certain books, papers, or other tangible things for the court.
(plural circlets) 1  A crown without arches or a covering. 2  A small circle. 3  A round body; an orb. ( UK, dialect) A circular piece of wood put under a dish at table.
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.