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USA - Geometry Circles

Equations of circles (centre at origin and at (h, k))

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Questions
Question 1
182101
What is the \(\textbf{standard form}\) of the equation of a circle with center \((h,k)\) and radius \(r\)?
A.
\(x^2+y^2=r^2\)
B.
\((x-h)^2+(y-k)^2=r^2\)
C.
\((x+h)^2+(y+k)^2=r^2\)
D.
\((x-h)^2-(y-k)^2=r^2\)
\((x-h)^2+(y-k)^2=r^2\)

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