Question

1 l Find the perimeter of a circle whose area is 154 cm?​

Answer 1

Answer:

44

Step-by-step explanation:

The formula to find to area of a circle is $\pi r^{2}$= Area

The perimiter formula is $2\pi r$ = Perimeter

Since we know the area (154cm)  we can find the radius (r) with the formula.

You first have to find what the radius of the circle is with.

$\pi =3.14$

$\pi r^{2}$= 154

3.14$r^{2}$=154

Now simplify.

$r^{2}$=49 (rounded)

r=7

Now we can find the perimeter with the formula above.

$2\pi r$= P

Now plug in.

2(3.14)(7)= P

44=P (Rounded)