Circumference 31.4 cm. Find the area of a circle whose radius is 1 cm larger than the radius of this circle.

| June 27, 2021 | education

1. Formula for calculating the circumference in terms of the radius:

С = 2 * pi * r, where pi = 3.14., We express from this formula the radius r = С / (2 * pi).

2. Find the radius of the given circle by substituting the known values ​​into the formula.

31.4 / (2 * 3.14) = 5 (cm) the radius of the given circle.

3. Find the radius of the circle which is 1 cm larger than the radius of this circle.

5 + 1 = 6 (cm) radius of the circle.

4. Find the area of ​​a circle whose radius is 1 cm larger than the radius of this circle.

The area of ​​a circle is calculated by the formula S = pi * R ^ 2, where pi = 3.14., We substitute the values ​​of the radius in the formula.

3.14 * 6 ^ 2 = 113.04 (cm2) the area of ​​a circle whose radius is 1 cm larger than the radius of this circle.

Answer: 113.04 cm2.



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.