Find the length of the circle if its radius is 4.2.
| February 28, 2021 | education
In the problem statement, the radius of the circle is specified and it is equal to R = 4.2 cm.
To find the circumference, you need to know the value of the constant – the number n = 3.14 (the number n is rounded to the nearest hundredth).
To find the circumference of a circle, we will use the following formula.
l = 2пR, where R is the radius of the circle, and we remembered the value of the number n above.
Substitute the known values into the formula and calculate the circumference:
l = 2 * 3.14 * 4.2 = 8.4 * 3.14 = 26.376 = 26.38 cm.
The length of a circle with a radius of R = 4.2 cm is equal to 26.38 cm.
Answer: The circumference is 26.38 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.
