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The question asks for the diameter of a circular paper plate that has been cut into two equal halves, with measurements provided for certain parts of the semicircles.

From the diagram, we see that the heights between the stacked semicircles are given as:
- 11 cm at the top and bottom,
- 6 cm between the middle semicircles,
- 8 cm between two adjacent semicircles in the middle.

These vertical distances represent the straight edges of the semicircles. Since these straight edges correspond to the radii of the semicircles, we can infer that the radius of the plate is the same as these measurements.

The question asks for the diameter, which is simply twice the radius.

### Steps:
- The largest vertical distance provided is 11 cm, which represents the radius of the plate.
- Therefore, the diameter \( d \) is:
\[
d = 2 \times \text{radius} = 2 \times 11 \text{ cm} = 22 \text{ cm}.
\]

So, the diameter of the paper plate is **22 cm**.

Would you like further details or have any questions?

Here are some related questions for deeper understanding:
1. How do you calculate the circumference of a circle given its diameter?
2. How would the calculation change if only the circumference was provided?
3. What is the area of this circular plate?
4. If each semicircle was part of a different object, how would the surface area be affected?
5. How could you use this information to find the total surface area of several plates?

**Tip:** Always remember that the diameter of a circle is twice the radius.

Adrian telah memotong beberapa pinggan kertas berbentuk bulatan kepada dua bahagian yang sama besar menjadi semibulatan. Berapakah diameter bagi sekeping pinggan kertas itu?

Learn how to calculate the diameter of a circular paper plate cut into two equal halves. Using geometric properties and provided measurements of semicircles, the solution shows that the diameter is 22 cm. This exercise is ideal for students in Grades 5-7.

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