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The radius of a circle is 5 centimeters. Find the circumference of the circle.

User Jesususo
by
8.2k points

2 Answers

13 votes

Answer:

31.42cm

Explanation:

C=2πr=2·π·5≈31.41593cm

User Northerner
by
8.1k points
3 votes

Solution: Circumference = 31.4 cm ✅


\searrow

Detailed explanation:

Hii, I'd love to help you out! (:

This problem is all about circles; how fun!

What we need to do is find the circumference of a circle with a 5-cm radius.


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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Yepp! This is only fun if we're familiar with the required formula.

The formula is shown below.


---\twoheadrightarrow\sf C=2\pi r

Here "C" denotes the circumference,

"
\pi" denotes the number pi, *

and "r" denotes the radius.

This question provides us:

  • Radius = 5 cm.


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* The number pi is an irrational number, which means we cannot write it as a fraction, no matter how hard we try. Can you imagine this? There are infinitely many digits after its decimal point.

So what I'm going to do is use 3.14 for pi

3.14.....∞ Wow!


\underbrace

Alright, so now it's time... to have fun solving for the circumference!


---\twoheadrightarrow\sf C=2\cdot3.14\cdot5


\bullet Multiply


---\twoheadrightarrow\sf C=31.4\;\;cm

That's all! See, it's ez as winking (;

  • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Voila! There's our answer!

Cheers!! ^-^


\searrow\swarrow

________________________

Hope I helped! Best wishes!

Reach far. Aim high. Dream big.

"reflection"

_______________________

User Raxit
by
8.2k points

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