kitty9477
kitty9477
15-03-2015
Mathematics
Answered
Find the center and radius of x^2+y^2=9
Answer :
Hippalectryon
Hippalectryon
15-03-2015
[tex]x^2+y^2=9\Leftrightarrow (x-0)^2+(y-0)^2=3^2[/tex] hence the center is
(0,0)
and the radius is
3
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konrad509
konrad509
15-03-2015
[tex](x-x_1)^2+(y-y_1)^2=r^2\\ \text{center}=(x_1,y_1)\\\\ x^2+y^2=9\\ (x-0)^2+(y-0)^2=9\\ \text{center}=(0,0)\\ r=\sqrt9=3 [/tex]
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