PARTS OF A CIRCLE

• A circle is a set of all points in a plane which are given point on the plane
• The fixed point of a circle is the center, and r is the radius
• A line segment is a part of the straight line that is bounded by two distinct points
• Radii is a plural name for radius
• Tangent is a line touching a curve at one point only
• Chords are lines joining any two points on a circle
• Secant is a line intersecting a curve at more than one point
• Diameter is a straight line passing through the centre of a circle or sphere and having its endpoints on the circumference.
• Arc is a portion of a circle between two radii or diameters
• Circumference is the distance around the edge of a circle or sphere
• Central angle is an angle whose vertex lies at the center of a circle, with sides that lie along the circle's perimeter
• Inscribed angle is an angle whose vertex lies inside a circle and whose sides lie along chords that meet at the vertex
• A major arc is greater than half the circumference.
• A minor arc is less than half the circumference.
• Sector is a section of the circle created by two radii.
• A major sector has a central angle which is more than 180°
• A minor sector has a central angle which is less than 180°
• Semi circle : Half of a circle. Could be considered a sector where the circle has be split by the diameter.
• Quadrant : A quarter of a circle, created by two perpendicular radii.
• Segment :

  A section of the circle created by a chord.
• Major segment – a segment where the arc is greater than half the circumference.
• Minor segment – a segment where the arc is less than half the circumference.