Q3 Module 6

• Circle


  A closed curve, all points of which are equidistant from a fixed point called the center
• Radius


  A segment whose one endpoint is in the center of the circle and the other endpoint is any point on the circle
• All radii of a circle are equal in measures
• Chord


  A segment whose endpoints are on the circle
• Diameter


  A chord that passes through the center of the circle
• Center


  The fixed point from which all points on the circle are equidistant
• Arc


  A part of the circumference of a circle
• Minor arc


  An arc less than a semicircle
• Major arc


  An arc greater than a semicircle
• Semicircle


  Half of a circle
• Central angle


  An angle whose vertex is the center of the circle
• Inscribed angle


  An angle whose vertex is on the circle and whose sides intersect the circle
• Secant


  A line that intersects a circle at two points
• Tangent


  A line that intersects a circle at exactly one point
• Lines related to a circle

  • Radius
  • Chord
  • Diameter
  • Secant
  • Tangent
• Chord


  A segment whose endpoints are any of two different points in the circle
• Diameter


  A chord which passes through the center of the circle. It is twice the length of a radius.
• Secant


  A line that contains a chord
• Tangent


  A line in the plane of a circle that intersects the circle at exactly one point, called the point of tangency
• Central angle


  An angle formed by two rays whose vertex is the center of the circle. Each ray intersects the circle at a point, dividing it into arcs.
• Arc


  A part or a portion of a circle
• Semicircle


  An arc with a measure equal to one-half the circumference of a circle
• Minor arc


  An arc of the circle that measures less than a semicircle
• Major arc


  An arc of the circle that measures greater than a semicircle
• Inscribed angle


  An angle whose vertex lies on a circle and its two sides are chords of a circle. The arc that lies in the interior of an inscribed angle and has endpoints on the angle is called the intercepted arc.
• A circle is a closed curve, all points of which are equidistant from a fixed point called the center
• A radius is a segment whose one endpoint is in the center of the circle and the other endpoint is any point on the circle
• A chord is a segment whose endpoints are any of two different points in the circle
• A diameter is a chord which passes through the center of the circle. It is twice the length of a radius.
• A tangent is a line in the plane of a circle that intersects the circle at exactly one point, called the point of tangency
• A semicircle is an arc with a measure equal to one-half the circumference of a circle
• A central angle is an angle formed by two rays whose vertex is the center of the circle. Each ray intersects the circle at a point, dividing it into arcs.
• A minor arc is an arc of the circle that measures less than a semicircle
• A major arc is an arc of the circle that measures greater than a semicircle
• An inscribed angle is an angle whose vertex lies on a circle and its two sides are chords of a circle. The arc that lies in the interior of an inscribed angle and has endpoints on the angle is called the intercepted arc.