calculate the are of a sector with a radius of 5cm and an angle of 40 degrees
calculate the area of a sector with a radius of 5cm and an angle of 40 degrees
\(A=\pi\ r^2\cdot\frac{\alpha}{360°}=\pi\cdot 5^2cm^2\cdot\frac{40°}{360°}\)
\( A=8.727\ cm^2\)
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