Robert drew a circle and labeled the circle s. He used the expression 12pi to find the circumference of the circle in meters. Which is the following could be the circle Robert d…

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asked May 20, 2023 87.3k views

1 Answer

Thanks · Answer 1 · 2023-05-24T20:22:46+0000

This question is about lenght of the circumference.

If we have a circumference with radius R, then its lenght s is given by:

$S\text{ = 2 }\cdot\text{ }\pi\text{ }\cdot\text{ R}$

If Robert says he can use 36 m to draw the circumference, then S = 36 m.

Let's plug that information on the equation above.

$36=2\cdot\pi\cdot R$

We know that:

$\pi=3$

So, we get:

$36=2\cdot3\cdot R$

Solving for R:

$36=6\cdot R$

$R=6\text{ m}$

Looking up we can see the correct answer is option B.