What is the circumference of a circle with a radius of 5?

What is the circumference of a circle with a radius of 5?

• A. 10π
• B. 15π
• C. 20π
• D. 25π

Answer: (A)

The circumference of a circle is calculated using the formula \( C = 2\pi r \), where \( r \) is the radius. In this case, the radius is 5. By substituting the radius into the formula, we get: \[ C = 2\pi(5) = 10\pi \] This demonstrates that the circumference of the circle with a radius of 5 is indeed \( 10\pi \). Other options propose different multiples of \( \pi \), which are not derived from the correct application of the circumference formula using the given radius. Therefore, the correct calculation leads to the choice that corresponds with \( 10\pi \) as the precise circumference of the circle.

The circumference of a circle is calculated using the formula ( C = 2\pi r ), where ( r ) is the radius. In this case, the radius is 5. By substituting the radius into the formula, we get:

[

C = 2\pi(5) = 10\pi

]

This demonstrates that the circumference of the circle with a radius of 5 is indeed ( 10\pi ).

Other options propose different multiples of ( \pi ), which are not derived from the correct application of the circumference formula using the given radius. Therefore, the correct calculation leads to the choice that corresponds with ( 10\pi ) as the precise circumference of the circle.