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  • 2019 April(Z15) Math Question 19

    Perimeter, Area, Volume

    - Triangles, Squares, Rectangles, Circles

    Choice E
    $$Circumference = π × diameter = 2 × π × radius.$$ $$2\pi r=12 \pi $$ $$\Rightarrow r=6 $$ $$Area=\pi r^{2}=\pi 6^{2}=36\pi $$

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