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Pearson Algebra 2 Common Core, 2011
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Pearson Algebra 2 Common Core, 2011 View details
End-of-Course Assessment
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Exercise 74 Page 971

What is the standard form of an equation of a circle?

G

Practice makes perfect
Let's start by recalling the standard form of an equation of a circle.

(x- h)^2+(y- k)^2= r^2 In this form, ( h, k) is the center of the circle and r is its radius. We are told that the center of the circle is ( - 4, - 6) and its radius is 6. This information is enough to write the equation. (x-( - 4))^2+(y-( - 6))^2= 6^2 ⇕ (x+4)^2+(y+6)^2=36 This corresponds to option G.

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