Let's analyze the image step-by-step and verify the calculations involving the circle.

Given Data

• The radius is labeled as 16.1 cm.

Let's calculate the other properties of the circle using the formulas:

• Diameter: $D = 2 \times r$
• Circumference: $C = 2 \pi r$
• Area: $A = \pi r^2$

Calculations

1. Radius: Given $r = 16.1 \, \text{cm}$.

2. Diameter: $D = 2 \times 16.1 = 32.2 \, \text{cm}$

3. Circumference: $C = 2 \pi \times 16.1 \approx 2 \times 3.14159 \times 16.1 \approx 101.16 \, \text{cm}$

4. Area: $A = \pi r^2 = \pi \times (16.1)^2 \approx 3.14159 \times 259.21 \approx 814.33 \, \text{cm}^2$

Verifying the Results in the Image:

The values calculated in the image seem incorrect as follows:

• Radius value is calculated as the area, $814.332 \, \text{cm}^2$.
• Diameter value is incorrectly listed as $40.7166 \, \text{cm}$ instead of $32.2 \, \text{cm}$.
• Area matches correctly at $814.332 \, \text{cm}^2$ if considered as the right placement.
• Circumference is incorrectly written as $8.05 \, \text{cm}$ instead of $101.16 \, \text{cm}$.

Would you like a deeper explanation of each formula and how to use them correctly?

Additional Questions

1. What is the formula for finding the radius if the circumference is given?
2. How do you convert the diameter to radius?
3. Can you explain why the value of π is essential in circle calculations?
4. What happens to the area if the radius is doubled?
5. How does changing the diameter affect the circumference?

Tip:

Always double-check calculations with the correct formulas, especially when involving π, to avoid common mistakes.