Question

measure of an arc of a sector of a circle is 90 degree and its radius is 7cm Find the perimeter of the sector​

Answer 1

,i hope this answer would be helpful

Answer 2

Answer:

25 cm²

Step-by-step explanation:

Since, the perimeter of a sector is,

$P=\theta r+2r$

Where, $\theta$ is the central angle of the arc of the sector ( in radian ),

r is the radius of the circle,

Here, r = 7 cm,

And, $\theta$ = 90° = $\frac{\pi}{2}$

Thus, the perimeter of the given sector is,

$P=\frac{\pi}{2}(7)+2\times 7$

$=\frac{22}{14}\times 7+14$

$=\frac{154}{14}+14=11+14=25\text{ square cm}$