Question

4
the diameter of the circle above is 20 cm. what is the circumference of the circle? (use π = 3.14.)
a. 31.4 cm
b. 314 cm
c. 62.8 cm
d. 628 cm

Explanation:

Step1: Recall the formula for circumference of a circle

The formula for the circumference \( C \) of a circle when the diameter \( d \) is known is \( C=\pi d \).

Step2: Substitute the given values

We are given that \( d = 20\space\text{cm} \) and \( \pi=3.14 \). Substituting these values into the formula, we get \( C = 3.14\times20 \).

Step3: Calculate the result

\( 3.14\times20 = 62.8 \space\text{cm} \).

Answer:

C. 62.8 cm