1. A circle has a number of tangents equal to

2. A tangent intersects the circle at:

3. A circle can have _____parallel tangents at a single time.

4. If the angle between two radii of a circle is 110º, then the angle between the tangents at the ends of the radii is:

5. The length of the tangent from an external point A on a circle with centre O is

6. AB is a chord of the circle and AOC is its diameter such that angle ACB = 50°. If AT is the tangent to the circle at the point A, then BAT is equal to

7. If TP and TQ are the two tangents to a circle with centre O so that ∠POQ = 110°, then ∠PTQ is equal to

8. The length of a tangent from a point A at a distance 5 cm from the centre of the circle is 4 cm. The radius of the circle is:

9. If a parallelogram circumscribes a circle, then it is a:

10. Two concentric circles are of radii 5 cm and 3 cm. The length of the chord of the larger circle which touches the smaller circle is:

11. If angle between two radii of a circle is 130°, the angle between the tangents at the ends of the radii is

12. We know that the sum of the angle between two radii of a circle and the angle between the tangents at the ends of the radii is 180°.

14. If two tangents inclined at an angle 60° are drawn to a circle of radius 3 cm, then length of each tangent is equal to

15. The tangent to a circle is ___________ to the radius through the point of contact.

19. Out of the two concentric circles, the radius of the outer circle is 5 cm and the chord AC of length 8 cm is a tangent to the inner circle. The radius of the inner circle will be

20. The distance between two parallel tangents of a circle is 18 cm, then the radius of the circle is