Question

what is the approximate circumference of the circle shown below?
a. 64 cm
b. 137 cm
c. 82 cm
d. 129 cm

Explanation:

Identify the given radius

Using the Radius of a Circle knowledge point

$$ r = 20.5\text{ cm} $$

Apply the circumference formula

Using the Circumference Formula knowledge point

$$ C = 2\pi r $$

Calculate the approximate value

Using the Circumference Formula knowledge point

$$
LATEXBLOCK0
$$

Match with the closest option

Using the Circumference Formula knowledge point

$$ C \approx 129\text{ cm} $$

Answer:

• A. 64 cm
• B. 137 cm
• C. 82 cm
• D. 129 cm (Correct answer)