Find the circumference of a circle with a radius of 3.5 cm.

1) The formula for the circumference of a circle: c = 2πr, where r is the radius. n ~ 3.14.

2) Circumference, with a radius of 3.5 cm: 2 * 3.14 * 3.5 = 22 cm.

3) When rounded to tens, we get the value: 20 cm.

Answer: the circumference, with a radius of 3.5 cm – 20 cm.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.