CIRCLES

3. A circle divides the plane, on which it lies, in ______ parts.
6. When two circles intersect at points A and B with AC and AD being the diameters of the first and second circle then the points B, C and D are ______.
8. ______ arcs of a circle subtend equal angles at the centre.
10. AD is a diameter of a circle and AB is a chord. If AD = 34 cm, AB = 30 cm, the distance of AB from the centre of the circle is ____________.
12. The length of the complete circle is called its ___
13. If PQ is a chord of a circle such that ∠PRQ = 90,where R is any point on circle then the PQ is the ________.
17. AB and CD are two equal chords of a circle with centre O such that ∠AOB = 80°, then ∠COD = ________
18. Equal chords of a circle subtend equal angles at ______________
19. The sum of either pair of opposite angles of a _______ is 180

1. Angles in the same ------- of a circle are equal.
2. A chord of a circle is equal to the radius of the circle. Then the angle subtended by the chord at a point on the major arc is ________ .
4. The ________ from the centre of a circle to a chord bisects the chord.
5. The centre of a circle lies in_________ of the circle.
7. ABCD is a cyclic quadrilateral such that AB is a diameter of the circle circumscribing it and ∠ ADC = 140º, then ∠ ABC is equal to:
8. If a line segment joining two points subtends equal angles at two other points lying on a the same side of the line containing the line segment, the four points lie on A ____--a
9. The longest chord of a circle is _______
11. A piece of a circle between two points is called an ____
14. A point, whose distance from the centre of a circle is greater than its radius lies in _______of the circle.
15. Angle in a semicircle is_____.
16. Diagonals of a cyclic quadrilateral are the diameters of that circle, then quadrilateral is a ______.