Which one is sector of circle?

Calculate the perimeter of the sector given the radius=5.5cm and angle=117.

Is the sentence true or false?

The formula to find the area of a sector is $\frac{θ}{360}\times\pi r^2$

Find the area of the sector for a given circle of radius 5 cm if the angle of its sector is 30°.

  Which one is sector of circle?

 Which one is sector of circle?

Is the sentence true or false?

$Arc\ length\ of\sec to=\frac{θ}{360}\times\pi\times d$

Which one is sector of circle?

Which one is the sector of circle?

Find the area of a sector given the radius=8cm and angle=115.