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Chapter 4 Basic Geometrical Ideas Ex 4.6 Solutions

Question - 1 : -
From the figure, identify:
(a) The centre of circle (e) Two points in the interior

(b) Three radii (f) a point in the exterior

(c) a diameter (g) a sector

(d) a chord (h) a segment

Answer - 1 : -

(a) O

(b) 

(c) 

(d) 

(e) O, P

(f) Q

(g) AOB (shaded region)

(h) DE (shaded region)

Question - 2 : -
(a) Is every diameter of a circle also a chord?

(b) Is every chord of circle also a diameter?

Answer - 2 : -

(a) Yes. The diameter is the longest possible chord of the circle.

(b) No

Question - 3 : -
Draw any circle and mark

(a) Its centre (e) a segment

(b) a radius (f) a point in its interior

(c) a diameter (g) a point in its exterior

(d) a sector (h) an arc

Answer - 3 : -

(a) O
(b)  
(c)  
(d) COA
(e) DE
(f) O
(g) F
(h)  

Question - 4 : -
Say true or false:

(a) Two diameters of a circle will necessarily intersect.

(b) The centre of a circle is always in its interior.

Answer - 4 : -

(a) True. They will always intersect each other at the centre of the circle.

(b) True

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