Respuesta :

First, you need to multiply 2*21cm, which gives us 42 cm.

Then we multiply it by π, or 22/7 in this case, and 22/7*42cm gives us 132 cm.

So the answer is: 132cm.

Hope this helped! c:

The circumference of the circle is 132 cm and this can be determined by using the formula of the circumference of the circle.

Given :

The radius of the circle is 21 cm.

The following steps can be used in order to determine the circumference of the circle:

Step 1 - The formula of the circumference of the circle can be used in order to determine the correct option.

Step 2 - The formula of the circumference of the circle is given below:

[tex]\rm Circumference = 2\pi r[/tex]

Step 3 - Substitute the value of 'r' in the above expression.

[tex]\rm Circumference = 2\times \dfrac{22}{7}\times 21[/tex]

Step 4 - Simplify the above expression.

[tex]\rm Circumference = 132\; cm[/tex]

Therefore, the correct option is C).

For more information, refer to the link given below:

https://brainly.com/question/5688156

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