To find the circumference of the circle from the provided image, we need to extract the following details:

Given Information:

• The width of the rectangle at the top is 10 meters.
• The height of the rectangle on the side is 7 meters.
• The shape beneath the rectangle is a semicircle.

Steps to Find the Circumference of the Circle:

1. Identify the diameter of the circle: The diameter of the semicircle matches the width of the rectangle, which is 10 meters.

   $\text{Diameter (D)} = 10 \, \text{m}$

2. Calculate the radius of the circle: The radius is half the diameter.

   $\text{Radius (r)} = \frac{D}{2} = \frac{10}{2} = 5 \, \text{m}$

3. Calculate the circumference of the full circle: The formula for the circumference of a full circle is:

   $C = 2 \pi r = 2 \pi \times 5 = 10 \pi \, \text{m}$

   Therefore, the total circumference of the full circle is $10 \pi$ meters, which is approximately $31.42 \, \text{m}$.

4. Interpret the question: Since the shape shown in the image is a semicircle, the circumference needed is half of the full circle. Additionally, we include the straight horizontal edge (the diameter) as part of the total perimeter around the shape.

   • The semicircular part's circumference is: $\text{Semicircle circumference} = \frac{C}{2} = \frac{10 \pi}{2} = 5 \pi \, \text{m} \approx 15.71 \, \text{m}$

   • Adding the diameter to the total perimeter: $\text{Total perimeter} = 5 \pi + 10 \approx 15.71 + 10 = 25.71 \, \text{m}$

Thus, the total perimeter around the semicircle is approximately 25.71 meters.

Let me know if you'd like more details or have questions! Here are 5 related questions for further practice:

1. What is the formula for the area of a circle?
2. How would you calculate the area of a semicircle?
3. If the radius of the circle were 6 meters, what would the circumference be?
4. What is the relationship between the diameter and circumference of a circle?
5. How can you calculate the area of a sector of a circle?

Tip: Always ensure that you include all necessary parts of a shape (like straight edges) when calculating perimeters for composite shapes.