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Question

Equation of circle whose centre is origin and radius is 3 is:

 
 


Correct Answer
A

x2 + y2 = 9

Your Answer
B

(x – h)2 + (y – k)2 = 9

Your Answer
C

x2 + y2 = 3

Your Answer
D

(x – h)2 + (y – k)2 = 3


Solution

The correct option is A

x2 + y2 = 9


Equation of circle is:

(x - 0)2 + (y – 0)2 = (3)2

or x2 + y2 = 9

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