Question

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

• A. 28cm
• B. 44cm
• C. 36cm
• D. 35cm

Answer 1

Answer:

C. 36cm

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

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

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

$=22+14$

$=36$