Find the perimeter of a sector with central angle 180 and radius 7cm

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A28cm

B44cm

C36cm

D35cm

Answer:

Perimeter of a sector $= 2\pi{r}\times\theta/360+ 2r$

$=2\pi\times7\times180/360+2\times7$

$=2\times22/7\times7\times1/2+14$

$=22+14$

$=36$

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