**Circles**

*CBSE Class 9 - Mathematics - Chapter 10*

Worksheet

Fill In the blanks

**1**. A _____ is a set of points in a plane, each one of which is at a constant distance from a fixed point in the plane.

**2**. A line segment joining two points on a circle is called the ______ of the circle.

**3**. A line which meets a circle in two points is called a ________ of the circle.

**4**. A chord passing through the center of the circle is called a ________ of the circle.

**5**. The fixed point in the circle is called the ________ and it is at constant distance from the boundary of the circle. This constant distance is called the _______ of the circle.

**6**. A (continuous) part of a circle is called a/an _______ of the circle and it is denoted by the symbol ____

**7**. The whole arc of a circle is called the _________ of the circle, while the half of the whole arc is called _______

**8**. Any angle whose vertex is centre of the circle is called a ____________.

**9**. The part of the plane region enclosed by an arc of a circle and its two bounding radii is called a ________ of a circle.

**10**. A ________ of circle is its longest chord.

**11**. A line can meet a circle at the most in ______ points.

**12**. In a circle, equal chords subtend __________ angles at the centre. (equal/unequal)

**13**. How many number of circles can be drawn through a given point P? __________ (one/two/infinite)

**14**. How many circles can be drawn through three non – collinear points? __________

**15**. Angle subtended by a semi-circle is a __________.

Answers:

1. circle

2. chord

3. secant

4. diameter

5. centre, radius

6. arc, ⌒

7. circumference, semi-circle

8. central angle

9. sector

10. diameter

11. two

12. equal

13. infinite

14. One and only one

15. right angle

its very useful

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