
Radius: A line joining the centre to any point on the circle. Diameter: Two times the radius is the diameter. Chord: A line segment joining any two points on the circle is chord. Major Arc and Minor Arc: Any two points A and B of a circle divide the circle into two points. If the two parts are unequal, the smaller part is called minor arc and the larger part is called major arc.
A circle divides the plane into three parts, its interior exterior and the circle itself.
Theorem 1: In a circle, the perpendicular from the center to the chord bisects the chord.
Theorem 2: Chords of a circle which are equidistant from the centre are equal.
Directions: Solve the following. 