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Semicircle Perimeter and Area Formulas Quiz

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1. What is the formula for the perimeter (P) of a semicircle with radius (r) and pi (π)?

2. If the area (A) of a semicircle is $25\pi\,cm^2$, what is its radius (r)?

3. What is the perimeter of a semicircle with a diameter of 14 cm? Assume \(\pi\) is approximately 3.14.

4. A semicircle's radius is doubled. How does this affect its area?

5. How is the area of a semicircle with radius 4 cm? Assume \(\pi\) is approximately 3.14.

6. If a semicircle has a perimeter of $22\,cm$, what is its radius, given \(\pi\) is approximately 3.14?

7. What is the correct expression for the area of a semicircle when given the diameter (d)?

8. Given a semicircle with an area of $16\pi\,cm^2$, what is its perimeter assuming \(\pi\) is approximately 3.14?

9. Calculate the perimeter of a semicircle whose area is $50\pi\,m^2$.

10. A playground is shaped like a semicircle with radius 8 meters. Including the straight edge, what is the total walking distance around it?