Hi there!
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I believe your answer is:
Around 69.08 centimeters.
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Here’s why:
![\text{Circumference of a Circle:}\\\\C=2\pi r\\\\\boxed{\text{Key:}}\\\\\text{r - radius}](https://img.qammunity.org/2022/formulas/mathematics/high-school/wvd1udiy69hlzhf7qikls6hgvnbrto6fq9.png)
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- The diameter is given. The radius is 11 cm.
- Recall that the radius is half the diameter.
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![\boxed{\text{Finding the Circumference:}}\\\\\text{I am using 3.14 for pi.}\\--------\\\rightarrow C=2(3.14)11\\\\\rightarrow C=6.28*11\\\\\rightarrow\boxed{69.08}](https://img.qammunity.org/2022/formulas/mathematics/high-school/czyjoi4tkuduouzrl3p6nrtpstfv8ttf5g.png)
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Hope this helps you. I apologize if it’s incorrect.