If the radius of a circle is 7 cm, then what is the circumference? Round to the nearest whole number.(1 point)

cm
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1 answer

The formula for the circumference \( C \) of a circle is given by:

\[ C = 2\pi r \]

where \( r \) is the radius of the circle. Given that the radius \( r \) is 7 cm, we can substitute this value into the formula:

\[ C = 2\pi \times 7 \approx 2 \times 3.14 \times 7 \]

Calculating this,

\[ C \approx 2 \times 3.14 \times 7 \approx 43.96 \]

Rounding this to the nearest whole number, the circumference is approximately:

\[ 44 \text{ cm} \]

So, the circumference of the circle is 44 cm.