**(1) From the figure, identify**

**(a)** **The center of circle****Ans. **The center of the circle in the given figure is point O.

**(b)Three radii****Ans. **The three radii in the given figure are – OA, OB and OC

**(c) A diameter****Ans. **A diameter in the given figure is AC

(Note – The diameter is the length of the line through the center that touches two points on the edge of the circle)

**(d) A chord****Ans. **A chord in the given figure is ED.

(Note – The *chord of a circle* is the line segment joining any two points on the circumference of the circle)

**(e) Two points in the interior****Ans. **The two points in the interior of the given figure are : Point O & Point P

**(f) A point in the exterior****Ans. **A point in the exterior of the circle is point Q.

**(g) A sector****Ans. **A sector in the given circle is AOB (the blue shaded portion of the given figure).

(Note – A sector is the portion of a disk enclosed by two radii and an arc in a circle)

**(h) A segment****Ans. **A segment in the given figure is ED (the red shaded portion of the given figure).

(Note – a segment is a region of a circle which is “cut off” from the rest of the circle by a secant or a chord)

**Question 2:****(a) Is every diameter of a circle also a chord?****Ans. **Yes, every diameter of a circle is also a chord.

In fact, diameter is also called as the longest chord of the circle.**(b)** **Is every chord of a circle also a diameter?****Ans. **No, every chord of a circle is not a diameter because diameter only passes through the center while for chord it is not necessary.

**Question 03:****Draw any circle and mark****(a) its centre****(b) a radius****(c) a diameter****(d) a sector****(e) a segment****(f) a point in its interior****(g) a point in its exterior ****(h) an arc**

**(4)** **Say true or false:**

**(a) Two diameters of a circle will necessarily intersect.****Ans. **True

Reason – All the diameters in a circle have to pass through the center of the circle. Therefore, diameters of a circle will necessarily intersect at its center.

**(b) The center of a circle is always in its interior.****Ans. **True, the center of a circle is always in its interior