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The image presents a diagram where circular plates are cut into semicircles and aligned vertically. The distances between these semicircles are labeled with the gaps between their flat sides. These distances are: 11 cm, 6 cm, 8 cm, 6 cm, and 11 cm.

The question asks for the diameter of each circular plate.

Since the semicircles are perfectly aligned with no gaps between the curved parts, the total length of the flat side of each semicircle corresponds to the diameter of the original circular plate. The total vertical length of the combined semicircles is the sum of the labeled distances.

To calculate the diameter:
1. Add the distances: \( 11 \, \text{cm} + 6 \, \text{cm} + 8 \, \text{cm} + 6 \, \text{cm} + 11 \, \text{cm} \).
2. Divide this sum by 2 (since each semicircle contributes half of a full circle's diameter).

Let me calculate this for you.The diameter of each circular plate is 21 cm.

Would you like further clarification or additional details?

Here are 5 related questions you might consider:
1. How can you calculate the radius if the diameter is known?
2. What is the area of one of these circular plates?
3. How do the semicircles contribute to the overall arrangement in terms of total surface area?
4. How would the problem change if there were gaps between the semicircles?
5. Can the circumference of these circular plates be calculated from the given information?

**Tip:** Remember that the radius is half of the diameter, which can be useful for various area or circumference calculations!

阿德里安将几个圆形纸盘切成两等份，形成半圆形。每个纸盘的直径是多少？

Learn how to calculate the diameter of circular plates that are cut into semicircles and arranged vertically. This problem involves geometry and basic circle calculations, suitable for Grades 6-8.

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