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Im confused on premtier

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we have to calculate the perimeter of the semicircle which radius is 16 mm


P_(sc)=(2\pi\cdot r)/(2)=\pi\cdot r=16\pi\approx50.26\operatorname{mm}

Now we have to add the outter sides of the triangle


P=20+20+50.26=90.26\operatorname{mm}

User Sergi Juanati
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