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16 April, 09:49

If (x - h) = 4 and (y - k) = 3, what is the radius of the circle above?

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  1. 16 April, 10:11
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    (x-h) ² + (y-k) ²=r² is the equation of a circle with radius of r

    so if x-h=4 and y-k=3 then

    4²+3²=r²

    16+9=r²

    25=r²

    sqrt both sides

    5=r

    radius is 5 units
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