Question

the diameter of the circle is 20.40 cm, and point d is the center. find the length of the radius and the approximate circumference of the circle.
radius (cm) | diameter (cm) | circumference (cm)
| 20.40 |

Explanation:

Step1: Calculate radius (half diameter)

$\text{Radius} = \frac{\text{Diameter}}{2} = \frac{20.40}{2}$

Step2: Compute the radius value

$\text{Radius} = 10.20$ cm

Step3: Calculate circumference ($C=\pi d$)

$\text{Circumference} = \pi \times 20.40$

Step4: Approximate circumference (use $\pi\approx3.1416$)

$\text{Circumference} \approx 3.1416 \times 20.40 = 64.08864$

Answer:

Radius: 10.20 cm
Circumference: approximately 64.09 cm (or 64.08864 cm)

Filled table values:

Radius (cm)	Diameter (cm)	Circumference (cm)