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s2008m [1.1K]
3 years ago
15

The area of circle is 770cm^2then find its circumfrence​

Mathematics
1 answer:
Gala2k [10]3 years ago
6 0

Answer:

The circumference is 98.39 centimeters (rounded to 2 decimal places)

Step-by-step explanation:

The area of a circle has the formula  \pi r^2

The circumference of a circle has the formula  2\pi r

First, let's find r from area given:

\pi r^ 2= 770\\r^2 = \frac{770}{\pi}\\r=\sqrt{\frac{770}{\pi}} \\r=15.66

Now, we can use this value of r and plug in into the formula for circumference. Shown below:

2\pi (15.66)\\=98.39

The circumference is 98.39 centimeters (rounded to 2 decimal places)

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