Calculate the approximate value for the circumference of a radius of 2.5 cm.

To calculate the approximate value for the circumference.

If, according to the condition of the problem, the radius of the circle is known – 2.5 cm, and the formula for the circumference is:

radius multiplied by the value of n and multiplied by 2, rounded to the nearest hundredth, the value of n is 3.14.

(2.5 * 3.14) * 2 = 15.7.

1) 2.5 * 3.14 = 7.85;

2). 7.85 * 2 = 15.7.

Answer: The approximate circumference is 15.7 cm.