Circle Properties Circle Properties Major Segment Chord Minor Segment The region bounded by an arc and a chord Major Segment Chord Minor Segment Segment The region bounded by an arc and a chord Minor Arc Minor Sector Major Sector Major Arc Minor Arc Minor Sector Major Sector Major Arc Cyclic Quadrilateral All four vertices of the quadrilateral lie on the circumference of a circle Cyclic Quadrilateral All four vertices of the quadrilateral lie on the circumference of a circle Tangent A straight line that touches the circle at one point Tangent A straight line that touches the circle at one point