Ok, so I have this picture. A semi-circle at the ends of a rectangle. It tells me that the perimeter is [tex]\frac 1 4[/tex]. So, isn't the total perimeter just the sum of the circle and rectange? [tex]P=2\pi r+2(L+W)[/tex](adsbygoogle = window.adsbygoogle || []).push({});

[tex]r=radius[/tex]

[tex]W=2r[/tex]

[tex]P=2\pi r+2(L+2r)[/tex]

And isn't the total area just the sum of the areas? [tex]A=A_{circle}+A_{rectange}\rightarrow A=\pi r^2 + 2rL[/tex]

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# Express Area as a function of r

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