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1. In the figure, the pair of tangents AP and AQ, drawn from an external point A to a circle with centre O, are perpendicular to each other and length of each tangent is 4 cm, then the radius of the circle is

2. The length of the tangent drawn from a point 8 cm away from the centre of a circle, of radius 6 cm, is :

3. Number of tangents, that can be drawn to a circle, parallel to a given chord is

4. How many tangents can be drawn to a circle from a point in its interior?

5. The tangents drawn at the ends of a diameter of a circle are:

6. A circle can pass through

7. If tangents PA and PB from a point P to a circle with centre O are inclined to each other an angle of 70° , then find ∠POA.

9. PQ is a tangent drawn from a point P to a circle with centre O and QOR is a diameter of the circle such that ∠POR=120°, then ∠OPQ is

11. A line that intersects a circle in exactly one point is called a

12. A line that intersects a circle in two distinct points is called a

13. The length of tangent drawn from an external point P to a circle, with centre O, is 8 cm. If the radius of the circle is 6 cm, then the length of OP (in cm) is:

14. A line segment having its end points on the circle is called a

15. Number of tangents from a point lying inside the circle is

16. The angle between two tangents drawn from an external point to a circle is 110°. The angle subtended at the centre by the segments joining the points of contact to the centre of circle is:

17. What is the distance between two parallel tangents of a circle of the radius 4 cm?

19. A tangent to a circle is a line that intersects the circle in

22. The distance between two parallel tangents to a circle of radius 5 cm is

23. A circle may have…….