- Area of Circle, Area of Triangle, Equation of a Circle, Tangent to a circleChoice C
$$ r=|h|=|-3|=3 $$
area of circle = $\pi r^2=\pi 3^2=9\pi$
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$$ r=|h|=|-3|=3 $$
area of circle = $\pi r^2=\pi 3^2=9\pi$
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