Equations of Circles w/sliders Questions II
4
What is the center of the given circle: [math]\left(x-2\right)^2+\left(y+5\right)^2=25[/math]
(2,-5)
5
What is the radius of [math]\left(x+3\right)^2+\left(y-8\right)^2=16[/math]
The radius is 4; [math]\sqrt{16}=4[/math]
6
Write the equation of a circle whose radius is 9 and center is (4,-7).
[math]\left(x-4\right)^2+\left(y+7\right)^2=81[/math]
7
Write the equation of a circle whose center is (3,0) and radius is 8.
[math]\left(x-3\right)^2+y^2=64[/math]
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