Respuesta :

Despina

Answer:

D. 42π

Step-by-step explanation:

To calculate the circumference of the circle, first we need to know the radius of the circle.

Area of the circle can be calculated by using the formula,

  • Area of circle = πr²

substituting the required values, we have :

441 π = πr²

dividing both sides by π

441 = r²

squaring both sides,

r = 21

Hence, the radius of the circle is 21 units

Now we can calculate the circumference of the circle. Circumference of the circle can be calculated by using the formula,

  • Circumference of Circle = 2πr

substituting the required values, we have :

Circumference = 2 π (21)

Circumference = 42π

Hence, the circumference of a circle that has area of 441π is 42π.

Otras preguntas