Question

find the circumference. 12 cm

Explanation:

Step1: Identify the radius

The dashed line is the radius \( r = 12 \, \text{cm} \).

Step2: Recall the circumference formula

The formula for the circumference \( C \) of a circle is \( C = 2\pi r \) (or \( C=\pi d \), where \( d = 2r \)).

Step3: Substitute the radius into the formula

Substitute \( r = 12 \) into \( C = 2\pi r \):
\( C = 2\times\pi\times12 \)
\( C = 24\pi \) (or approximately \( 24\times3.14 = 75.36 \, \text{cm} \) if using \( \pi\approx3.14 \)).

Answer:

The circumference is \( 24\pi \, \text{cm} \) (or approximately \( 75.36 \, \text{cm} \)).