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Standard Equation of Circles

Quick practice

Question 1 of 5

Find the equation of the circle whose radius is 2 \sqrt{2} \mathrm{cm}  and centre is (0,0)

A

x^{2}-y^{2}=16

B

x+y=4

C

x-y=16

D

x^{2}+y^{2}=8

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