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Margaret [11]
3 years ago
13

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

Mathematics
1 answer:
Alenkasestr [34]3 years ago
4 0

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

3.14r^{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)

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